Finding the Fourth Proportional to 80,978.47, 121,353.52 and 38,238.29

Step by Step Solution

1. Step 1: Write the proportion equation
   80,978.47 : 121,353.52 = 38,238.29 : x
2. Step 2: Convert to fraction form
   80,978.47/121,353.52 = 38,238.29/x
3. Step 3: Cross multiply
   80,978.47x = 121,353.52 × 38,238.29
4. Step 4: Simplify right side
   80,978.47x = 4,640,350,899.09
5. Step 5: Solve for x
   x = 4,640,350,899.09/80,978.47
6. Step 6: Final answer
   x = 57,303.52