Finding the Third Proportional to 51,399.19 and 77,098.88

Step by Step Solution

1. Step 1: Write the proportion equation
   51,399.19 : 77,098.88 = 77,098.88 : x
2. Step 2: Convert to fraction form
   51,399.19/77,098.88 = 77,098.88/x
3. Step 3: Cross multiply
   51,399.19x = 77,098.88 × 77,098.88
4. Step 4: Simplify right side
   51,399.19x = 5,944,236,526.27
5. Step 5: Solve for x
   x = 5,944,236,526.27/51,399.19
6. Step 6: Final answer
   x = 115,648.45