Finding the Fourth Proportional to 5,271,390.40, 7,274,969.76 and 2,979,958.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,271,390.40 : 7,274,969.76 = 2,979,958.72 : x
2. Step 2: Convert to fraction form
   5,271,390.40/7,274,969.76 = 2,979,958.72/x
3. Step 3: Cross multiply
   5,271,390.40x = 7,274,969.76 × 2,979,958.72
4. Step 4: Simplify right side
   5,271,390.40x = 21,679,109,574,048.31
5. Step 5: Solve for x
   x = 21,679,109,574,048.31/5,271,390.40
6. Step 6: Final answer
   x = 4,112,597.99