Finding the Fourth Proportional to 1,259,426.88, 1,738,009.59 and 715,563.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,259,426.88 : 1,738,009.59 = 715,563.38 : x
2. Step 2: Convert to fraction form
   1,259,426.88/1,738,009.59 = 715,563.38/x
3. Step 3: Cross multiply
   1,259,426.88x = 1,738,009.59 × 715,563.38
4. Step 4: Simplify right side
   1,259,426.88x = 1,243,656,008,002.77
5. Step 5: Solve for x
   x = 1,243,656,008,002.77/1,259,426.88
6. Step 6: Final answer
   x = 987,477.74