Finding the Fourth Proportional to 1,603,912.71, 2,213,118.18 and 915,270.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,603,912.71 : 2,213,118.18 = 915,270.15 : x
2. Step 2: Convert to fraction form
   1,603,912.71/2,213,118.18 = 915,270.15/x
3. Step 3: Cross multiply
   1,603,912.71x = 2,213,118.18 × 915,270.15
4. Step 4: Simplify right side
   1,603,912.71x = 2,025,601,008,576.33
5. Step 5: Solve for x
   x = 2,025,601,008,576.33/1,603,912.71
6. Step 6: Final answer
   x = 1,262,912.25