Finding the Fourth Proportional to 78,947.90, 108,948.12 and 42,649.35

Step by Step Solution

1. Step 1: Write the proportion equation
   78,947.90 : 108,948.12 = 42,649.35 : x
2. Step 2: Convert to fraction form
   78,947.90/108,948.12 = 42,649.35/x
3. Step 3: Cross multiply
   78,947.90x = 108,948.12 × 42,649.35
4. Step 4: Simplify right side
   78,947.90x = 4,646,566,501.72
5. Step 5: Solve for x
   x = 4,646,566,501.72/78,947.90
6. Step 6: Final answer
   x = 58,856.12