Finding the Third Proportional to 118,518 and 250,978.50

Step by Step Solution

1. Step 1: Write the proportion equation
   118,518 : 250,978.50 = 250,978.50 : x
2. Step 2: Convert to fraction form
   118,518/250,978.50 = 250,978.50/x
3. Step 3: Cross multiply
   118,518x = 250,978.50 × 250,978.50
4. Step 4: Simplify right side
   118,518x = 62,990,207,462.25
5. Step 5: Solve for x
   x = 62,990,207,462.25/118,518
6. Step 6: Final answer
   x = 531,482.20