Finding the Fourth Proportional to 424,086.64, 636,132.69 and 124,566.05

Step by Step Solution

1. Step 1: Write the proportion equation
   424,086.64 : 636,132.69 = 124,566.05 : x
2. Step 2: Convert to fraction form
   424,086.64/636,132.69 = 124,566.05/x
3. Step 3: Cross multiply
   424,086.64x = 636,132.69 × 124,566.05
4. Step 4: Simplify right side
   424,086.64x = 79,240,538,059.51
5. Step 5: Solve for x
   x = 79,240,538,059.51/424,086.64
6. Step 6: Final answer
   x = 186,849.88