Finding the Fourth Proportional to 99,396.72, 137,171.25 and 56,963.45

Step by Step Solution

1. Step 1: Write the proportion equation
   99,396.72 : 137,171.25 = 56,963.45 : x
2. Step 2: Convert to fraction form
   99,396.72/137,171.25 = 56,963.45/x
3. Step 3: Cross multiply
   99,396.72x = 137,171.25 × 56,963.45
4. Step 4: Simplify right side
   99,396.72x = 7,813,747,983.74
5. Step 5: Solve for x
   x = 7,813,747,983.74/99,396.72
6. Step 6: Final answer
   x = 78,611.73