Finding the Fourth Proportional to 78,402.17, 108,239.82 and 51,622.49

Step by Step Solution

1. Step 1: Write the proportion equation
   78,402.17 : 108,239.82 = 51,622.49 : x
2. Step 2: Convert to fraction form
   78,402.17/108,239.82 = 51,622.49/x
3. Step 3: Cross multiply
   78,402.17x = 108,239.82 × 51,622.49
4. Step 4: Simplify right side
   78,402.17x = 5,587,609,025.55
5. Step 5: Solve for x
   x = 5,587,609,025.55/78,402.17
6. Step 6: Final answer
   x = 71,268.55