Finding the Fourth Proportional to 120,142.10, 180,265.89 and 57,007.86

Step by Step Solution

1. Step 1: Write the proportion equation
   120,142.10 : 180,265.89 = 57,007.86 : x
2. Step 2: Convert to fraction form
   120,142.10/180,265.89 = 57,007.86/x
3. Step 3: Cross multiply
   120,142.10x = 180,265.89 × 57,007.86
4. Step 4: Simplify right side
   120,142.10x = 10,276,572,619.90
5. Step 5: Solve for x
   x = 10,276,572,619.90/120,142.10
6. Step 6: Final answer
   x = 85,536.82