Finding the Fourth Proportional to 78,426.90, 108,229.26 and 42,617.34

Step by Step Solution

1. Step 1: Write the proportion equation
   78,426.90 : 108,229.26 = 42,617.34 : x
2. Step 2: Convert to fraction form
   78,426.90/108,229.26 = 42,617.34/x
3. Step 3: Cross multiply
   78,426.90x = 108,229.26 × 42,617.34
4. Step 4: Simplify right side
   78,426.90x = 4,612,443,171.37
5. Step 5: Solve for x
   x = 4,612,443,171.37/78,426.90
6. Step 6: Final answer
   x = 58,812.00