Finding the Fourth Proportional to 69,092.37, 103,640.31 and 51,672.78

Step by Step Solution

1. Step 1: Write the proportion equation
   69,092.37 : 103,640.31 = 51,672.78 : x
2. Step 2: Convert to fraction form
   69,092.37/103,640.31 = 51,672.78/x
3. Step 3: Cross multiply
   69,092.37x = 103,640.31 × 51,672.78
4. Step 4: Simplify right side
   69,092.37x = 5,355,382,937.76
5. Step 5: Solve for x
   x = 5,355,382,937.76/69,092.37
6. Step 6: Final answer
   x = 77,510.48