Finding the Fourth Proportional to 12,355.57, 17,050.56 and 6,690.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,355.57 : 17,050.56 = 6,690.22 : x
2. Step 2: Convert to fraction form
   12,355.57/17,050.56 = 6,690.22/x
3. Step 3: Cross multiply
   12,355.57x = 17,050.56 × 6,690.22
4. Step 4: Simplify right side
   12,355.57x = 114,071,997.52
5. Step 5: Solve for x
   x = 114,071,997.52/12,355.57
6. Step 6: Final answer
   x = 9,232.44