Finding the Fourth Proportional to 89,460.18, 123,419.70 and 57,647.64

Step by Step Solution

1. Step 1: Write the proportion equation
   89,460.18 : 123,419.70 = 57,647.64 : x
2. Step 2: Convert to fraction form
   89,460.18/123,419.70 = 57,647.64/x
3. Step 3: Cross multiply
   89,460.18x = 123,419.70 × 57,647.64
4. Step 4: Simplify right side
   89,460.18x = 7,114,854,434.51
5. Step 5: Solve for x
   x = 7,114,854,434.51/89,460.18
6. Step 6: Final answer
   x = 79,530.96