Finding the Fourth Proportional to 78,501.71, 108,331.33 and 42,690.95

Step by Step Solution

1. Step 1: Write the proportion equation
   78,501.71 : 108,331.33 = 42,690.95 : x
2. Step 2: Convert to fraction form
   78,501.71/108,331.33 = 42,690.95/x
3. Step 3: Cross multiply
   78,501.71x = 108,331.33 × 42,690.95
4. Step 4: Simplify right side
   78,501.71x = 4,624,767,392.46
5. Step 5: Solve for x
   x = 4,624,767,392.46/78,501.71
6. Step 6: Final answer
   x = 58,912.95