Finding the Fourth Proportional to 78,680.50, 108,580.17 and 45,146.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,680.50 : 108,580.17 = 45,146.50 : x
2. Step 2: Convert to fraction form
   78,680.50/108,580.17 = 45,146.50/x
3. Step 3: Cross multiply
   78,680.50x = 108,580.17 × 45,146.50
4. Step 4: Simplify right side
   78,680.50x = 4,902,014,644.91
5. Step 5: Solve for x
   x = 4,902,014,644.91/78,680.50
6. Step 6: Final answer
   x = 62,302.79