Finding the Fourth Proportional to 93,121.43, 139,682.15 and 76,638.83

Step by Step Solution

1. Step 1: Write the proportion equation
   93,121.43 : 139,682.15 = 76,638.83 : x
2. Step 2: Convert to fraction form
   93,121.43/139,682.15 = 76,638.83/x
3. Step 3: Cross multiply
   93,121.43x = 139,682.15 × 76,638.83
4. Step 4: Simplify right side
   93,121.43x = 10,705,076,164.69
5. Step 5: Solve for x
   x = 10,705,076,164.69/93,121.43
6. Step 6: Final answer
   x = 114,958.25