Finding the Third Proportional to 381,373.31 and 558,414

Step by Step Solution

1. Step 1: Write the proportion equation
   381,373.31 : 558,414 = 558,414 : x
2. Step 2: Convert to fraction form
   381,373.31/558,414 = 558,414/x
3. Step 3: Cross multiply
   381,373.31x = 558,414 × 558,414
4. Step 4: Simplify right side
   381,373.31x = 311,826,195,396
5. Step 5: Solve for x
   x = 311,826,195,396/381,373.31
6. Step 6: Final answer
   x = 817,640.32