Finding the Fourth Proportional to 78,320.14, 108,081.88 and 42,510.15

Step by Step Solution

1. Step 1: Write the proportion equation
   78,320.14 : 108,081.88 = 42,510.15 : x
2. Step 2: Convert to fraction form
   78,320.14/108,081.88 = 42,510.15/x
3. Step 3: Cross multiply
   78,320.14x = 108,081.88 × 42,510.15
4. Step 4: Simplify right side
   78,320.14x = 4,594,576,824.81
5. Step 5: Solve for x
   x = 4,594,576,824.81/78,320.14
6. Step 6: Final answer
   x = 58,664.05