Finding the Fourth Proportional to 78,617.34, 108,490.50 and 42,806.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78,617.34 : 108,490.50 = 42,806.76 : x
2. Step 2: Convert to fraction form
   78,617.34/108,490.50 = 42,806.76/x
3. Step 3: Cross multiply
   78,617.34x = 108,490.50 × 42,806.76
4. Step 4: Simplify right side
   78,617.34x = 4,644,126,795.78
5. Step 5: Solve for x
   x = 4,644,126,795.78/78,617.34
6. Step 6: Final answer
   x = 59,072.55