Finding the Fourth Proportional to 99,570.86, 137,406.53 and 54,250.73

Step by Step Solution

1. Step 1: Write the proportion equation
   99,570.86 : 137,406.53 = 54,250.73 : x
2. Step 2: Convert to fraction form
   99,570.86/137,406.53 = 54,250.73/x
3. Step 3: Cross multiply
   99,570.86x = 137,406.53 × 54,250.73
4. Step 4: Simplify right side
   99,570.86x = 7,454,404,288.01
5. Step 5: Solve for x
   x = 7,454,404,288.01/99,570.86
6. Step 6: Final answer
   x = 74,865.32