Finding the Fourth Proportional to 99,906.94, 137,867.50 and 54,586.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,906.94 : 137,867.50 = 54,586.50 : x
2. Step 2: Convert to fraction form
   99,906.94/137,867.50 = 54,586.50/x
3. Step 3: Cross multiply
   99,906.94x = 137,867.50 × 54,586.50
4. Step 4: Simplify right side
   99,906.94x = 7,525,704,288.75
5. Step 5: Solve for x
   x = 7,525,704,288.75/99,906.94
6. Step 6: Final answer
   x = 75,327.14