Finding the Fourth Proportional to 78,681.22, 108,624.59 and 54,517.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,681.22 : 108,624.59 = 54,517.30 : x
2. Step 2: Convert to fraction form
   78,681.22/108,624.59 = 54,517.30/x
3. Step 3: Cross multiply
   78,681.22x = 108,624.59 × 54,517.30
4. Step 4: Simplify right side
   78,681.22x = 5,921,919,087.82
5. Step 5: Solve for x
   x = 5,921,919,087.82/78,681.22
6. Step 6: Final answer
   x = 75,264.71