Finding the Fourth Proportional to 142,057.18, 196,109.87 and 88,359.45

Step by Step Solution

1. Step 1: Write the proportion equation
   142,057.18 : 196,109.87 = 88,359.45 : x
2. Step 2: Convert to fraction form
   142,057.18/196,109.87 = 88,359.45/x
3. Step 3: Cross multiply
   142,057.18x = 196,109.87 × 88,359.45
4. Step 4: Simplify right side
   142,057.18x = 17,328,160,252.77
5. Step 5: Solve for x
   x = 17,328,160,252.77/142,057.18
6. Step 6: Final answer
   x = 121,980.18