Finding the Fourth Proportional to 12,873,128.31, 17,757,037.49 and 7,642,586.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,873,128.31 : 17,757,037.49 = 7,642,586.52 : x
2. Step 2: Convert to fraction form
   12,873,128.31/17,757,037.49 = 7,642,586.52/x
3. Step 3: Cross multiply
   12,873,128.31x = 17,757,037.49 × 7,642,586.52
4. Step 4: Simplify right side
   12,873,128.31x = 135,709,695,317,995.69
5. Step 5: Solve for x
   x = 135,709,695,317,995.69/12,873,128.31
6. Step 6: Final answer
   x = 10,542,091.41