Finding the Fourth Proportional to 340,404.10, 510,606.15 and 91,086.10

Step by Step Solution

1. Step 1: Write the proportion equation
   340,404.10 : 510,606.15 = 91,086.10 : x
2. Step 2: Convert to fraction form
   340,404.10/510,606.15 = 91,086.10/x
3. Step 3: Cross multiply
   340,404.10x = 510,606.15 × 91,086.10
4. Step 4: Simplify right side
   340,404.10x = 46,509,122,839.52
5. Step 5: Solve for x
   x = 46,509,122,839.52/340,404.10
6. Step 6: Final answer
   x = 136,629.15