Finding the Fourth Proportional to 78,320.42, 108,082.38 and 42,510.43

Step by Step Solution

1. Step 1: Write the proportion equation
   78,320.42 : 108,082.38 = 42,510.43 : x
2. Step 2: Convert to fraction form
   78,320.42/108,082.38 = 42,510.43/x
3. Step 3: Cross multiply
   78,320.42x = 108,082.38 × 42,510.43
4. Step 4: Simplify right side
   78,320.42x = 4,594,628,449.22
5. Step 5: Solve for x
   x = 4,594,628,449.22/78,320.42
6. Step 6: Final answer
   x = 58,664.50