Finding the Fourth Proportional to 1,089,215.59, 1,503,434.06 and 726,638.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,089,215.59 : 1,503,434.06 = 726,638.55 : x
2. Step 2: Convert to fraction form
   1,089,215.59/1,503,434.06 = 726,638.55/x
3. Step 3: Cross multiply
   1,089,215.59x = 1,503,434.06 × 726,638.55
4. Step 4: Simplify right side
   1,089,215.59x = 1,092,453,147,383.70
5. Step 5: Solve for x
   x = 1,092,453,147,383.70/1,089,215.59
6. Step 6: Final answer
   x = 1,002,972.38