Finding the Third Proportional to 20,430.56 and 31,240.13

Step by Step Solution

1. Step 1: Write the proportion equation
   20,430.56 : 31,240.13 = 31,240.13 : x
2. Step 2: Convert to fraction form
   20,430.56/31,240.13 = 31,240.13/x
3. Step 3: Cross multiply
   20,430.56x = 31,240.13 × 31,240.13
4. Step 4: Simplify right side
   20,430.56x = 975,945,410.02
5. Step 5: Solve for x
   x = 975,945,410.02/20,430.56
6. Step 6: Final answer
   x = 47,768.90