Finding the Third Proportional to 12,915 and 31,027.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,915 : 31,027.50 = 31,027.50 : x
2. Step 2: Convert to fraction form
   12,915/31,027.50 = 31,027.50/x
3. Step 3: Cross multiply
   12,915x = 31,027.50 × 31,027.50
4. Step 4: Simplify right side
   12,915x = 962,705,756.25
5. Step 5: Solve for x
   x = 962,705,756.25/12,915
6. Step 6: Final answer
   x = 74,541.68