Finding the Fourth Proportional to 1,319,300.69, 1,820,638.46 and 715,688.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,319,300.69 : 1,820,638.46 = 715,688.69 : x
2. Step 2: Convert to fraction form
   1,319,300.69/1,820,638.46 = 715,688.69/x
3. Step 3: Cross multiply
   1,319,300.69x = 1,820,638.46 × 715,688.69
4. Step 4: Simplify right side
   1,319,300.69x = 1,303,010,354,401.02
5. Step 5: Solve for x
   x = 1,303,010,354,401.02/1,319,300.69
6. Step 6: Final answer
   x = 987,652.30