Finding the Fourth Proportional to 140,564.10, 193,979.89 and 76,900.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,564.10 : 193,979.89 = 76,900.50 : x
2. Step 2: Convert to fraction form
   140,564.10/193,979.89 = 76,900.50/x
3. Step 3: Cross multiply
   140,564.10x = 193,979.89 × 76,900.50
4. Step 4: Simplify right side
   140,564.10x = 14,917,150,530.95
5. Step 5: Solve for x
   x = 14,917,150,530.95/140,564.10
6. Step 6: Final answer
   x = 106,123.47