Finding the Third Proportional to 423,522 and 621,158.63

Step by Step Solution

1. Step 1: Write the proportion equation
   423,522 : 621,158.63 = 621,158.63 : x
2. Step 2: Convert to fraction form
   423,522/621,158.63 = 621,158.63/x
3. Step 3: Cross multiply
   423,522x = 621,158.63 × 621,158.63
4. Step 4: Simplify right side
   423,522x = 385,838,037,411.89
5. Step 5: Solve for x
   x = 385,838,037,411.89/423,522
6. Step 6: Final answer
   x = 911,022.42