Finding the Fourth Proportional to 1,581,055.61, 2,181,856.28 and 855,902.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,581,055.61 : 2,181,856.28 = 855,902.79 : x
2. Step 2: Convert to fraction form
   1,581,055.61/2,181,856.28 = 855,902.79/x
3. Step 3: Cross multiply
   1,581,055.61x = 2,181,856.28 × 855,902.79
4. Step 4: Simplify right side
   1,581,055.61x = 1,867,456,873,151.51
5. Step 5: Solve for x
   x = 1,867,456,873,151.51/1,581,055.61
6. Step 6: Final answer
   x = 1,181,145.60