Finding the Fourth Proportional to 89,196.02, 122,989.61 and 56,887.43

Step by Step Solution

1. Step 1: Write the proportion equation
   89,196.02 : 122,989.61 = 56,887.43 : x
2. Step 2: Convert to fraction form
   89,196.02/122,989.61 = 56,887.43/x
3. Step 3: Cross multiply
   89,196.02x = 122,989.61 × 56,887.43
4. Step 4: Simplify right side
   89,196.02x = 6,996,561,930.22
5. Step 5: Solve for x
   x = 6,996,561,930.22/89,196.02
6. Step 6: Final answer
   x = 78,440.30