Finding the Third Proportional to 181,290 and 398,827.50

Step by Step Solution

1. Step 1: Write the proportion equation
   181,290 : 398,827.50 = 398,827.50 : x
2. Step 2: Convert to fraction form
   181,290/398,827.50 = 398,827.50/x
3. Step 3: Cross multiply
   181,290x = 398,827.50 × 398,827.50
4. Step 4: Simplify right side
   181,290x = 159,063,374,756.25
5. Step 5: Solve for x
   x = 159,063,374,756.25/181,290
6. Step 6: Final answer
   x = 877,397.40