Finding the Fourth Proportional to 78,681.84, 108,580.95 and 42,871.86

Step by Step Solution

1. Step 1: Write the proportion equation
   78,681.84 : 108,580.95 = 42,871.86 : x
2. Step 2: Convert to fraction form
   78,681.84/108,580.95 = 42,871.86/x
3. Step 3: Cross multiply
   78,681.84x = 108,580.95 × 42,871.86
4. Step 4: Simplify right side
   78,681.84x = 4,655,067,287.07
5. Step 5: Solve for x
   x = 4,655,067,287.07/78,681.84
6. Step 6: Final answer
   x = 59,163.17