Finding the Fourth Proportional to 3,989,880.12, 5,506,069.76 and 2,271,111.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,989,880.12 : 5,506,069.76 = 2,271,111.28 : x
2. Step 2: Convert to fraction form
   3,989,880.12/5,506,069.76 = 2,271,111.28/x
3. Step 3: Cross multiply
   3,989,880.12x = 5,506,069.76 × 2,271,111.28
4. Step 4: Simplify right side
   3,989,880.12x = 12,504,897,140,402.89
5. Step 5: Solve for x
   x = 12,504,897,140,402.89/3,989,880.12
6. Step 6: Final answer
   x = 3,134,153.60