Finding the Fourth Proportional to 133,081.10, 199,644.69 and 54,238.22

Step by Step Solution

1. Step 1: Write the proportion equation
   133,081.10 : 199,644.69 = 54,238.22 : x
2. Step 2: Convert to fraction form
   133,081.10/199,644.69 = 54,238.22/x
3. Step 3: Cross multiply
   133,081.10x = 199,644.69 × 54,238.22
4. Step 4: Simplify right side
   133,081.10x = 10,828,372,618.05
5. Step 5: Solve for x
   x = 10,828,372,618.05/133,081.10
6. Step 6: Final answer
   x = 81,366.72