Finding the Fourth Proportional to 124,036.61, 185,907.29 and 86,392.88

Step by Step Solution

1. Step 1: Write the proportion equation
   124,036.61 : 185,907.29 = 86,392.88 : x
2. Step 2: Convert to fraction form
   124,036.61/185,907.29 = 86,392.88/x
3. Step 3: Cross multiply
   124,036.61x = 185,907.29 × 86,392.88
4. Step 4: Simplify right side
   124,036.61x = 16,061,066,196.10
5. Step 5: Solve for x
   x = 16,061,066,196.10/124,036.61
6. Step 6: Final answer
   x = 129,486.50