Finding the Fourth Proportional to 89,460.20, 123,419.66 and 57,647.63

Step by Step Solution

1. Step 1: Write the proportion equation
   89,460.20 : 123,419.66 = 57,647.63 : x
2. Step 2: Convert to fraction form
   89,460.20/123,419.66 = 57,647.63/x
3. Step 3: Cross multiply
   89,460.20x = 123,419.66 × 57,647.63
4. Step 4: Simplify right side
   89,460.20x = 7,114,849,989.07
5. Step 5: Solve for x
   x = 7,114,849,989.07/89,460.20
6. Step 6: Final answer
   x = 79,530.90