Finding the Fourth Proportional to 140,648.91, 194,095.71 and 76,990.74

Step by Step Solution

1. Step 1: Write the proportion equation
   140,648.91 : 194,095.71 = 76,990.74 : x
2. Step 2: Convert to fraction form
   140,648.91/194,095.71 = 76,990.74/x
3. Step 3: Cross multiply
   140,648.91x = 194,095.71 × 76,990.74
4. Step 4: Simplify right side
   140,648.91x = 14,943,572,343.73
5. Step 5: Solve for x
   x = 14,943,572,343.73/140,648.91
6. Step 6: Final answer
   x = 106,247.34