Finding the Fourth Proportional to 64,978.24, 89,670.72 and 38,121.22

Step by Step Solution

1. Step 1: Write the proportion equation
   64,978.24 : 89,670.72 = 38,121.22 : x
2. Step 2: Convert to fraction form
   64,978.24/89,670.72 = 38,121.22/x
3. Step 3: Cross multiply
   64,978.24x = 89,670.72 × 38,121.22
4. Step 4: Simplify right side
   64,978.24x = 3,418,357,244.68
5. Step 5: Solve for x
   x = 3,418,357,244.68/64,978.24
6. Step 6: Final answer
   x = 52,607.72