Finding the Fourth Proportional to 83,679.86, 115,472.72 and 49,686.60

Step by Step Solution

1. Step 1: Write the proportion equation
   83,679.86 : 115,472.72 = 49,686.60 : x
2. Step 2: Convert to fraction form
   83,679.86/115,472.72 = 49,686.60/x
3. Step 3: Cross multiply
   83,679.86x = 115,472.72 × 49,686.60
4. Step 4: Simplify right side
   83,679.86x = 5,737,446,849.55
5. Step 5: Solve for x
   x = 5,737,446,849.55/83,679.86
6. Step 6: Final answer
   x = 68,564.25