Finding the Fourth Proportional to 99,568.38, 137,404.29 and 54,856.38

Step by Step Solution

1. Step 1: Write the proportion equation
   99,568.38 : 137,404.29 = 54,856.38 : x
2. Step 2: Convert to fraction form
   99,568.38/137,404.29 = 54,856.38/x
3. Step 3: Cross multiply
   99,568.38x = 137,404.29 × 54,856.38
4. Step 4: Simplify right side
   99,568.38x = 7,537,501,945.87
5. Step 5: Solve for x
   x = 7,537,501,945.87/99,568.38
6. Step 6: Final answer
   x = 75,701.76