Finding the Fourth Proportional to 1,390,829.82, 1,919,321.91 and 778,977.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,390,829.82 : 1,919,321.91 = 778,977.42 : x
2. Step 2: Convert to fraction form
   1,390,829.82/1,919,321.91 = 778,977.42/x
3. Step 3: Cross multiply
   1,390,829.82x = 1,919,321.91 × 778,977.42
4. Step 4: Simplify right side
   1,390,829.82x = 1,495,108,429,601.27
5. Step 5: Solve for x
   x = 1,495,108,429,601.27/1,390,829.82
6. Step 6: Final answer
   x = 1,074,975.82