Finding the Fourth Proportional to 99,388.38, 137,159.82 and 56,955.33

Step by Step Solution

1. Step 1: Write the proportion equation
   99,388.38 : 137,159.82 = 56,955.33 : x
2. Step 2: Convert to fraction form
   99,388.38/137,159.82 = 56,955.33/x
3. Step 3: Cross multiply
   99,388.38x = 137,159.82 × 56,955.33
4. Step 4: Simplify right side
   99,388.38x = 7,811,982,810.84
5. Step 5: Solve for x
   x = 7,811,982,810.84/99,388.38
6. Step 6: Final answer
   x = 78,600.56