Finding the Fourth Proportional to 99,748.50, 137,655.81 and 55,039.38

Step by Step Solution

1. Step 1: Write the proportion equation
   99,748.50 : 137,655.81 = 55,039.38 : x
2. Step 2: Convert to fraction form
   99,748.50/137,655.81 = 55,039.38/x
3. Step 3: Cross multiply
   99,748.50x = 137,655.81 × 55,039.38
4. Step 4: Simplify right side
   99,748.50x = 7,576,490,435.80
5. Step 5: Solve for x
   x = 7,576,490,435.80/99,748.50
6. Step 6: Final answer
   x = 75,955.93