Finding the Fourth Proportional to 12,900,156.72, 19,338,255.72 and 5,707,849.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,900,156.72 : 19,338,255.72 = 5,707,849.20 : x
2. Step 2: Convert to fraction form
   12,900,156.72/19,338,255.72 = 5,707,849.20/x
3. Step 3: Cross multiply
   12,900,156.72x = 19,338,255.72 × 5,707,849.20
4. Step 4: Simplify right side
   12,900,156.72x = 110,379,847,440,797.42
5. Step 5: Solve for x
   x = 110,379,847,440,797.42/12,900,156.72
6. Step 6: Final answer
   x = 8,556,473.37