Finding the Fourth Proportional to 78,320.62, 108,082.55 and 42,510.63

Step by Step Solution

1. Step 1: Write the proportion equation
   78,320.62 : 108,082.55 = 42,510.63 : x
2. Step 2: Convert to fraction form
   78,320.62/108,082.55 = 42,510.63/x
3. Step 3: Cross multiply
   78,320.62x = 108,082.55 × 42,510.63
4. Step 4: Simplify right side
   78,320.62x = 4,594,657,292.51
5. Step 5: Solve for x
   x = 4,594,657,292.51/78,320.62
6. Step 6: Final answer
   x = 58,664.72