Finding the Fourth Proportional to 78,682.61, 108,583.25 and 42,872.63

Step by Step Solution

1. Step 1: Write the proportion equation
   78,682.61 : 108,583.25 = 42,872.63 : x
2. Step 2: Convert to fraction form
   78,682.61/108,583.25 = 42,872.63/x
3. Step 3: Cross multiply
   78,682.61x = 108,583.25 × 42,872.63
4. Step 4: Simplify right side
   78,682.61x = 4,655,248,744.17
5. Step 5: Solve for x
   x = 4,655,248,744.17/78,682.61
6. Step 6: Final answer
   x = 59,164.90