Finding the Third Proportional to 215,214 and 272,875.50

Step by Step Solution

1. Step 1: Write the proportion equation
   215,214 : 272,875.50 = 272,875.50 : x
2. Step 2: Convert to fraction form
   215,214/272,875.50 = 272,875.50/x
3. Step 3: Cross multiply
   215,214x = 272,875.50 × 272,875.50
4. Step 4: Simplify right side
   215,214x = 74,461,038,500.25
5. Step 5: Solve for x
   x = 74,461,038,500.25/215,214
6. Step 6: Final answer
   x = 345,986.03