Finding the Third Proportional to 12,156.75 and 28,621.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,156.75 : 28,621.88 = 28,621.88 : x
2. Step 2: Convert to fraction form
   12,156.75/28,621.88 = 28,621.88/x
3. Step 3: Cross multiply
   12,156.75x = 28,621.88 × 28,621.88
4. Step 4: Simplify right side
   12,156.75x = 819,211,728.52
5. Step 5: Solve for x
   x = 819,211,728.52/12,156.75
6. Step 6: Final answer
   x = 67,387.40