Finding the Fourth Proportional to 83,920.58, 115,771.28 and 49,909.98

Step by Step Solution

1. Step 1: Write the proportion equation
   83,920.58 : 115,771.28 = 49,909.98 : x
2. Step 2: Convert to fraction form
   83,920.58/115,771.28 = 49,909.98/x
3. Step 3: Cross multiply
   83,920.58x = 115,771.28 × 49,909.98
4. Step 4: Simplify right side
   83,920.58x = 5,778,142,269.37
5. Step 5: Solve for x
   x = 5,778,142,269.37/83,920.58
6. Step 6: Final answer
   x = 68,852.51