Finding the Fourth Proportional to 140,661.72, 194,117.76 and 76,999.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,661.72 : 194,117.76 = 76,999.50 : x
2. Step 2: Convert to fraction form
   140,661.72/194,117.76 = 76,999.50/x
3. Step 3: Cross multiply
   140,661.72x = 194,117.76 × 76,999.50
4. Step 4: Simplify right side
   140,661.72x = 14,946,970,461.12
5. Step 5: Solve for x
   x = 14,946,970,461.12/140,661.72
6. Step 6: Final answer
   x = 106,261.82