Finding the Fourth Proportional to 99,632.40, 137,488.56 and 54,309.39

Step by Step Solution

1. Step 1: Write the proportion equation
   99,632.40 : 137,488.56 = 54,309.39 : x
2. Step 2: Convert to fraction form
   99,632.40/137,488.56 = 54,309.39/x
3. Step 3: Cross multiply
   99,632.40x = 137,488.56 × 54,309.39
4. Step 4: Simplify right side
   99,632.40x = 7,466,919,825.58
5. Step 5: Solve for x
   x = 7,466,919,825.58/99,632.40
6. Step 6: Final answer
   x = 74,944.69