Finding the Fourth Proportional to 1,292,294.16, 1,783,061.28 and 1,086,345.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,292,294.16 : 1,783,061.28 = 1,086,345.72 : x
2. Step 2: Convert to fraction form
   1,292,294.16/1,783,061.28 = 1,086,345.72/x
3. Step 3: Cross multiply
   1,292,294.16x = 1,783,061.28 × 1,086,345.72
4. Step 4: Simplify right side
   1,292,294.16x = 1,937,020,990,025.72
5. Step 5: Solve for x
   x = 1,937,020,990,025.72/1,292,294.16
6. Step 6: Final answer
   x = 1,498,900.99