Finding the Third Proportional to 152,987.50 and 215,059.50

Step by Step Solution

1. Step 1: Write the proportion equation
   152,987.50 : 215,059.50 = 215,059.50 : x
2. Step 2: Convert to fraction form
   152,987.50/215,059.50 = 215,059.50/x
3. Step 3: Cross multiply
   152,987.50x = 215,059.50 × 215,059.50
4. Step 4: Simplify right side
   152,987.50x = 46,250,588,540.25
5. Step 5: Solve for x
   x = 46,250,588,540.25/152,987.50
6. Step 6: Final answer
   x = 302,316.13