Finding the Fourth Proportional to 2,158,660.61, 2,978,956.06 and 1,191,792.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,660.61 : 2,978,956.06 = 1,191,792.77 : x
2. Step 2: Convert to fraction form
   2,158,660.61/2,978,956.06 = 1,191,792.77/x
3. Step 3: Cross multiply
   2,158,660.61x = 2,978,956.06 × 1,191,792.77
4. Step 4: Simplify right side
   2,158,660.61x = 3,550,298,276,581.42
5. Step 5: Solve for x
   x = 3,550,298,276,581.42/2,158,660.61
6. Step 6: Final answer
   x = 1,644,676.46