Finding the Fourth Proportional to 78,681.06, 108,578.46 and 42,871.35

Step by Step Solution

1. Step 1: Write the proportion equation
   78,681.06 : 108,578.46 = 42,871.35 : x
2. Step 2: Convert to fraction form
   78,681.06/108,578.46 = 42,871.35/x
3. Step 3: Cross multiply
   78,681.06x = 108,578.46 × 42,871.35
4. Step 4: Simplify right side
   78,681.06x = 4,654,905,161.12
5. Step 5: Solve for x
   x = 4,654,905,161.12/78,681.06
6. Step 6: Final answer
   x = 59,161.70