Finding the Third Proportional to 31,290.05 and 67,888.13

Step by Step Solution

1. Step 1: Write the proportion equation
   31,290.05 : 67,888.13 = 67,888.13 : x
2. Step 2: Convert to fraction form
   31,290.05/67,888.13 = 67,888.13/x
3. Step 3: Cross multiply
   31,290.05x = 67,888.13 × 67,888.13
4. Step 4: Simplify right side
   31,290.05x = 4,608,797,516.02
5. Step 5: Solve for x
   x = 4,608,797,516.02/31,290.05
6. Step 6: Final answer
   x = 147,292.76