Finding the Fourth Proportional to 140,123.92, 210,179.99 and 65,218.30

Step by Step Solution

1. Step 1: Write the proportion equation
   140,123.92 : 210,179.99 = 65,218.30 : x
2. Step 2: Convert to fraction form
   140,123.92/210,179.99 = 65,218.30/x
3. Step 3: Cross multiply
   140,123.92x = 210,179.99 × 65,218.30
4. Step 4: Simplify right side
   140,123.92x = 13,707,581,641.82
5. Step 5: Solve for x
   x = 13,707,581,641.82/140,123.92
6. Step 6: Final answer
   x = 97,824.71