Finding the Third Proportional to 402,126 and 866,034.75

Step by Step Solution

1. Step 1: Write the proportion equation
   402,126 : 866,034.75 = 866,034.75 : x
2. Step 2: Convert to fraction form
   402,126/866,034.75 = 866,034.75/x
3. Step 3: Cross multiply
   402,126x = 866,034.75 × 866,034.75
4. Step 4: Simplify right side
   402,126x = 750,016,188,207.56
5. Step 5: Solve for x
   x = 750,016,188,207.56/402,126
6. Step 6: Final answer
   x = 1,865,127.32