Finding the Fourth Proportional to 78,760.52, 108,707.76 and 51,907.80

Step by Step Solution

1. Step 1: Write the proportion equation
   78,760.52 : 108,707.76 = 51,907.80 : x
2. Step 2: Convert to fraction form
   78,760.52/108,707.76 = 51,907.80/x
3. Step 3: Cross multiply
   78,760.52x = 108,707.76 × 51,907.80
4. Step 4: Simplify right side
   78,760.52x = 5,642,780,664.53
5. Step 5: Solve for x
   x = 5,642,780,664.53/78,760.52
6. Step 6: Final answer
   x = 71,644.79