Finding the Third Proportional to 442,411.50 and 680,931

Step by Step Solution

1. Step 1: Write the proportion equation
   442,411.50 : 680,931 = 680,931 : x
2. Step 2: Convert to fraction form
   442,411.50/680,931 = 680,931/x
3. Step 3: Cross multiply
   442,411.50x = 680,931 × 680,931
4. Step 4: Simplify right side
   442,411.50x = 463,667,026,761
5. Step 5: Solve for x
   x = 463,667,026,761/442,411.50
6. Step 6: Final answer
   x = 1,048,044.70