Finding the Fourth Proportional to 78,707.96, 108,617.10 and 42,898

Step by Step Solution

1. Step 1: Write the proportion equation
   78,707.96 : 108,617.10 = 42,898 : x
2. Step 2: Convert to fraction form
   78,707.96/108,617.10 = 42,898/x
3. Step 3: Cross multiply
   78,707.96x = 108,617.10 × 42,898
4. Step 4: Simplify right side
   78,707.96x = 4,659,456,355.80
5. Step 5: Solve for x
   x = 4,659,456,355.80/78,707.96
6. Step 6: Final answer
   x = 59,199.30