Finding the Fourth Proportional to 1,287,733.72, 1,777,069.50 and 714,780.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,287,733.72 : 1,777,069.50 = 714,780.76 : x
2. Step 2: Convert to fraction form
   1,287,733.72/1,777,069.50 = 714,780.76/x
3. Step 3: Cross multiply
   1,287,733.72x = 1,777,069.50 × 714,780.76
4. Step 4: Simplify right side
   1,287,733.72x = 1,270,215,087,782.82
5. Step 5: Solve for x
   x = 1,270,215,087,782.82/1,287,733.72
6. Step 6: Final answer
   x = 986,395.76