Finding the Third Proportional to 31,700.11 and 42,699.66

Step by Step Solution

1. Step 1: Write the proportion equation
   31,700.11 : 42,699.66 = 42,699.66 : x
2. Step 2: Convert to fraction form
   31,700.11/42,699.66 = 42,699.66/x
3. Step 3: Cross multiply
   31,700.11x = 42,699.66 × 42,699.66
4. Step 4: Simplify right side
   31,700.11x = 1,823,260,643.87
5. Step 5: Solve for x
   x = 1,823,260,643.87/31,700.11
6. Step 6: Final answer
   x = 57,515.91