Finding the Third Proportional to 426,343.50 and 615,942

Step by Step Solution

1. Step 1: Write the proportion equation
   426,343.50 : 615,942 = 615,942 : x
2. Step 2: Convert to fraction form
   426,343.50/615,942 = 615,942/x
3. Step 3: Cross multiply
   426,343.50x = 615,942 × 615,942
4. Step 4: Simplify right side
   426,343.50x = 379,384,547,364
5. Step 5: Solve for x
   x = 379,384,547,364/426,343.50
6. Step 6: Final answer
   x = 889,856.53