Finding the Fourth Proportional to 78,681.59, 108,577.55 and 42,871.87

Step by Step Solution

1. Step 1: Write the proportion equation
   78,681.59 : 108,577.55 = 42,871.87 : x
2. Step 2: Convert to fraction form
   78,681.59/108,577.55 = 42,871.87/x
3. Step 3: Cross multiply
   78,681.59x = 108,577.55 × 42,871.87
4. Step 4: Simplify right side
   78,681.59x = 4,654,922,122.72
5. Step 5: Solve for x
   x = 4,654,922,122.72/78,681.59
6. Step 6: Final answer
   x = 59,161.52