Finding the Third Proportional to 358,123.50 and 558,981

Step by Step Solution

1. Step 1: Write the proportion equation
   358,123.50 : 558,981 = 558,981 : x
2. Step 2: Convert to fraction form
   358,123.50/558,981 = 558,981/x
3. Step 3: Cross multiply
   358,123.50x = 558,981 × 558,981
4. Step 4: Simplify right side
   358,123.50x = 312,459,758,361
5. Step 5: Solve for x
   x = 312,459,758,361/358,123.50
6. Step 6: Final answer
   x = 872,491.64