Finding the Fourth Proportional to 123,753.66, 185,600.72 and 57,129.81

Step by Step Solution

1. Step 1: Write the proportion equation
   123,753.66 : 185,600.72 = 57,129.81 : x
2. Step 2: Convert to fraction form
   123,753.66/185,600.72 = 57,129.81/x
3. Step 3: Cross multiply
   123,753.66x = 185,600.72 × 57,129.81
4. Step 4: Simplify right side
   123,753.66x = 10,603,333,583.81
5. Step 5: Solve for x
   x = 10,603,333,583.81/123,753.66
6. Step 6: Final answer
   x = 85,680.97