Finding the Fourth Proportional to 80,978.66, 121,468.01 and 43,487.16

Step by Step Solution

1. Step 1: Write the proportion equation
   80,978.66 : 121,468.01 = 43,487.16 : x
2. Step 2: Convert to fraction form
   80,978.66/121,468.01 = 43,487.16/x
3. Step 3: Cross multiply
   80,978.66x = 121,468.01 × 43,487.16
4. Step 4: Simplify right side
   80,978.66x = 5,282,298,785.75
5. Step 5: Solve for x
   x = 5,282,298,785.75/80,978.66
6. Step 6: Final answer
   x = 65,230.75