Finding the Third Proportional to 20,315 and 42,847.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,315 : 42,847.50 = 42,847.50 : x
2. Step 2: Convert to fraction form
   20,315/42,847.50 = 42,847.50/x
3. Step 3: Cross multiply
   20,315x = 42,847.50 × 42,847.50
4. Step 4: Simplify right side
   20,315x = 1,835,908,256.25
5. Step 5: Solve for x
   x = 1,835,908,256.25/20,315
6. Step 6: Final answer
   x = 90,372.05