Finding the Fourth Proportional to 742,401.90, 1,024,514.62 and 402,870.15

Step by Step Solution

1. Step 1: Write the proportion equation
   742,401.90 : 1,024,514.62 = 402,870.15 : x
2. Step 2: Convert to fraction form
   742,401.90/1,024,514.62 = 402,870.15/x
3. Step 3: Cross multiply
   742,401.90x = 1,024,514.62 × 402,870.15
4. Step 4: Simplify right side
   742,401.90x = 412,746,357,629.42
5. Step 5: Solve for x
   x = 412,746,357,629.42/742,401.90
6. Step 6: Final answer
   x = 555,960.80