Finding the Fourth Proportional to 99,667.62, 137,553.72 and 57,225.24

Step by Step Solution

1. Step 1: Write the proportion equation
   99,667.62 : 137,553.72 = 57,225.24 : x
2. Step 2: Convert to fraction form
   99,667.62/137,553.72 = 57,225.24/x
3. Step 3: Cross multiply
   99,667.62x = 137,553.72 × 57,225.24
4. Step 4: Simplify right side
   99,667.62x = 7,871,544,639.89
5. Step 5: Solve for x
   x = 7,871,544,639.89/99,667.62
6. Step 6: Final answer
   x = 78,977.95