Finding the Fourth Proportional to 1,311,018,780.48, 1,809,184,514.72 and 716,290,466.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,311,018,780.48 : 1,809,184,514.72 = 716,290,466.24 : x
2. Step 2: Convert to fraction form
   1,311,018,780.48/1,809,184,514.72 = 716,290,466.24/x
3. Step 3: Cross multiply
   1,311,018,780.48x = 1,809,184,514.72 × 716,290,466.24
4. Step 4: Simplify right side
   1,311,018,780.48x = 1,295,901,619,562,977,024
5. Step 5: Solve for x
   x = 1,295,901,619,562,977,024/1,311,018,780.48
6. Step 6: Final answer
   x = 988,469,149.99