Finding the Fourth Proportional to 78,315.16, 108,075.03 and 42,505.17

Step by Step Solution

1. Step 1: Write the proportion equation
   78,315.16 : 108,075.03 = 42,505.17 : x
2. Step 2: Convert to fraction form
   78,315.16/108,075.03 = 42,505.17/x
3. Step 3: Cross multiply
   78,315.16x = 108,075.03 × 42,505.17
4. Step 4: Simplify right side
   78,315.16x = 4,593,747,541.83
5. Step 5: Solve for x
   x = 4,593,747,541.83/78,315.16
6. Step 6: Final answer
   x = 58,657.19