Finding the Fourth Proportional to 64,978.58, 89,689.20 and 38,122.22

Step by Step Solution

1. Step 1: Write the proportion equation
   64,978.58 : 89,689.20 = 38,122.22 : x
2. Step 2: Convert to fraction form
   64,978.58/89,689.20 = 38,122.22/x
3. Step 3: Cross multiply
   64,978.58x = 89,689.20 × 38,122.22
4. Step 4: Simplify right side
   64,978.58x = 3,419,151,414.02
5. Step 5: Solve for x
   x = 3,419,151,414.02/64,978.58
6. Step 6: Final answer
   x = 52,619.67