Finding the Third Proportional to 20,430.94 and 31,240.69

Step by Step Solution

1. Step 1: Write the proportion equation
   20,430.94 : 31,240.69 = 31,240.69 : x
2. Step 2: Convert to fraction form
   20,430.94/31,240.69 = 31,240.69/x
3. Step 3: Cross multiply
   20,430.94x = 31,240.69 × 31,240.69
4. Step 4: Simplify right side
   20,430.94x = 975,980,555.47
5. Step 5: Solve for x
   x = 975,980,555.47/20,430.94
6. Step 6: Final answer
   x = 47,769.74