Finding the Third Proportional to 421,528.50 and 632,308.50

Step by Step Solution

1. Step 1: Write the proportion equation
   421,528.50 : 632,308.50 = 632,308.50 : x
2. Step 2: Convert to fraction form
   421,528.50/632,308.50 = 632,308.50/x
3. Step 3: Cross multiply
   421,528.50x = 632,308.50 × 632,308.50
4. Step 4: Simplify right side
   421,528.50x = 399,814,039,172.25
5. Step 5: Solve for x
   x = 399,814,039,172.25/421,528.50
6. Step 6: Final answer
   x = 948,486.38