Finding the Fourth Proportional to 12,345.58, 17,036.83 and 7,040.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,345.58 : 17,036.83 = 7,040.28 : x
2. Step 2: Convert to fraction form
   12,345.58/17,036.83 = 7,040.28/x
3. Step 3: Cross multiply
   12,345.58x = 17,036.83 × 7,040.28
4. Step 4: Simplify right side
   12,345.58x = 119,944,053.51
5. Step 5: Solve for x
   x = 119,944,053.51/12,345.58
6. Step 6: Final answer
   x = 9,715.55