Finding the Fourth Proportional to 123,643.02, 185,501.49 and 87,688.74

Step by Step Solution

1. Step 1: Write the proportion equation
   123,643.02 : 185,501.49 = 87,688.74 : x
2. Step 2: Convert to fraction form
   123,643.02/185,501.49 = 87,688.74/x
3. Step 3: Cross multiply
   123,643.02x = 185,501.49 × 87,688.74
4. Step 4: Simplify right side
   123,643.02x = 16,266,391,926.22
5. Step 5: Solve for x
   x = 16,266,391,926.22/123,643.02
6. Step 6: Final answer
   x = 131,559.32