Finding the Fourth Proportional to 133,116.86, 199,502.94 and 54,139.34

Step by Step Solution

1. Step 1: Write the proportion equation
   133,116.86 : 199,502.94 = 54,139.34 : x
2. Step 2: Convert to fraction form
   133,116.86/199,502.94 = 54,139.34/x
3. Step 3: Cross multiply
   133,116.86x = 199,502.94 × 54,139.34
4. Step 4: Simplify right side
   133,116.86x = 10,800,957,499.66
5. Step 5: Solve for x
   x = 10,800,957,499.66/133,116.86
6. Step 6: Final answer
   x = 81,138.91