Finding the Fourth Proportional to 765,587.59, 1,149,179.42 and 339,422.69

Step by Step Solution

1. Step 1: Write the proportion equation
   765,587.59 : 1,149,179.42 = 339,422.69 : x
2. Step 2: Convert to fraction form
   765,587.59/1,149,179.42 = 339,422.69/x
3. Step 3: Cross multiply
   765,587.59x = 1,149,179.42 × 339,422.69
4. Step 4: Simplify right side
   765,587.59x = 390,057,572,477.71
5. Step 5: Solve for x
   x = 390,057,572,477.71/765,587.59
6. Step 6: Final answer
   x = 509,487.85