Finding the Fourth Proportional to 78,947.21, 108,947.17 and 42,648.66

Step by Step Solution

1. Step 1: Write the proportion equation
   78,947.21 : 108,947.17 = 42,648.66 : x
2. Step 2: Convert to fraction form
   78,947.21/108,947.17 = 42,648.66/x
3. Step 3: Cross multiply
   78,947.21x = 108,947.17 × 42,648.66
4. Step 4: Simplify right side
   78,947.21x = 4,646,451,273.15
5. Step 5: Solve for x
   x = 4,646,451,273.15/78,947.21
6. Step 6: Final answer
   x = 58,855.17