Finding the Fourth Proportional to 140,643.07, 194,089.26 and 76,979.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,643.07 : 194,089.26 = 76,979.50 : x
2. Step 2: Convert to fraction form
   140,643.07/194,089.26 = 76,979.50/x
3. Step 3: Cross multiply
   140,643.07x = 194,089.26 × 76,979.50
4. Step 4: Simplify right side
   140,643.07x = 14,940,892,834.83
5. Step 5: Solve for x
   x = 14,940,892,834.83/140,643.07
6. Step 6: Final answer
   x = 106,232.70