Finding the Fourth Proportional to 115,915.70, 173,588.42 and 56,559.98

Step by Step Solution

1. Step 1: Write the proportion equation
   115,915.70 : 173,588.42 = 56,559.98 : x
2. Step 2: Convert to fraction form
   115,915.70/173,588.42 = 56,559.98/x
3. Step 3: Cross multiply
   115,915.70x = 173,588.42 × 56,559.98
4. Step 4: Simplify right side
   115,915.70x = 9,818,156,836.89
5. Step 5: Solve for x
   x = 9,818,156,836.89/115,915.70
6. Step 6: Final answer
   x = 84,700.84