Finding the Fourth Proportional to 2,166,271.94, 2,989,486.78 and 1,247,994.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,166,271.94 : 2,989,486.78 = 1,247,994.38 : x
2. Step 2: Convert to fraction form
   2,166,271.94/2,989,486.78 = 1,247,994.38/x
3. Step 3: Cross multiply
   2,166,271.94x = 2,989,486.78 × 1,247,994.38
4. Step 4: Simplify right side
   2,166,271.94x = 3,730,862,700,524.30
5. Step 5: Solve for x
   x = 3,730,862,700,524.30/2,166,271.94
6. Step 6: Final answer
   x = 1,722,250.39