Finding the Fourth Proportional to 99,424.83, 137,208.80 and 54,105.27

Step by Step Solution

1. Step 1: Write the proportion equation
   99,424.83 : 137,208.80 = 54,105.27 : x
2. Step 2: Convert to fraction form
   99,424.83/137,208.80 = 54,105.27/x
3. Step 3: Cross multiply
   99,424.83x = 137,208.80 × 54,105.27
4. Step 4: Simplify right side
   99,424.83x = 7,423,718,899.85
5. Step 5: Solve for x
   x = 7,423,718,899.85/99,424.83
6. Step 6: Final answer
   x = 74,666.65