Finding the Fourth Proportional to 5,138,846.40, 7,091,328.72 and 2,846,870.40

Step by Step Solution

1. Step 1: Write the proportion equation
   5,138,846.40 : 7,091,328.72 = 2,846,870.40 : x
2. Step 2: Convert to fraction form
   5,138,846.40/7,091,328.72 = 2,846,870.40/x
3. Step 3: Cross multiply
   5,138,846.40x = 7,091,328.72 × 2,846,870.40
4. Step 4: Simplify right side
   5,138,846.40x = 20,188,093,829,637.89
5. Step 5: Solve for x
   x = 20,188,093,829,637.89/5,138,846.40
6. Step 6: Final answer
   x = 3,928,526.42