Finding the Third Proportional to 274,891.69 and 387,100.88

Step by Step Solution

1. Step 1: Write the proportion equation
   274,891.69 : 387,100.88 = 387,100.88 : x
2. Step 2: Convert to fraction form
   274,891.69/387,100.88 = 387,100.88/x
3. Step 3: Cross multiply
   274,891.69x = 387,100.88 × 387,100.88
4. Step 4: Simplify right side
   274,891.69x = 149,847,087,425.77
5. Step 5: Solve for x
   x = 149,847,087,425.77/274,891.69
6. Step 6: Final answer
   x = 545,113.20