Finding the Fourth Proportional to 12,771,752.86, 19,140,995.13 and 5,189,854.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,771,752.86 : 19,140,995.13 = 5,189,854.78 : x
2. Step 2: Convert to fraction form
   12,771,752.86/19,140,995.13 = 5,189,854.78/x
3. Step 3: Cross multiply
   12,771,752.86x = 19,140,995.13 × 5,189,854.78
4. Step 4: Simplify right side
   12,771,752.86x = 99,338,985,103,044.45
5. Step 5: Solve for x
   x = 99,338,985,103,044.45/12,771,752.86
6. Step 6: Final answer
   x = 7,778,022.81