Finding the Third Proportional to 318,843 and 488,308.50

Step by Step Solution

1. Step 1: Write the proportion equation
   318,843 : 488,308.50 = 488,308.50 : x
2. Step 2: Convert to fraction form
   318,843/488,308.50 = 488,308.50/x
3. Step 3: Cross multiply
   318,843x = 488,308.50 × 488,308.50
4. Step 4: Simplify right side
   318,843x = 238,445,191,172.25
5. Step 5: Solve for x
   x = 238,445,191,172.25/318,843
6. Step 6: Final answer
   x = 747,845.15