Finding the Fourth Proportional to 99,426.69, 137,206.56 and 54,104.79

Step by Step Solution

1. Step 1: Write the proportion equation
   99,426.69 : 137,206.56 = 54,104.79 : x
2. Step 2: Convert to fraction form
   99,426.69/137,206.56 = 54,104.79/x
3. Step 3: Cross multiply
   99,426.69x = 137,206.56 × 54,104.79
4. Step 4: Simplify right side
   99,426.69x = 7,423,532,115.42
5. Step 5: Solve for x
   x = 7,423,532,115.42/99,426.69
6. Step 6: Final answer
   x = 74,663.37