Finding the Fourth Proportional to 1,356,816.12, 1,872,407.69 and 805,641.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356,816.12 : 1,872,407.69 = 805,641.86 : x
2. Step 2: Convert to fraction form
   1,356,816.12/1,872,407.69 = 805,641.86/x
3. Step 3: Cross multiply
   1,356,816.12x = 1,872,407.69 × 805,641.86
4. Step 4: Simplify right side
   1,356,816.12x = 1,508,490,014,049.90
5. Step 5: Solve for x
   x = 1,508,490,014,049.90/1,356,816.12
6. Step 6: Final answer
   x = 1,111,786.62