Finding the Fourth Proportional to 13,199.19, 19,767.38 and 7,640.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,199.19 : 19,767.38 = 7,640.82 : x
2. Step 2: Convert to fraction form
   13,199.19/19,767.38 = 7,640.82/x
3. Step 3: Cross multiply
   13,199.19x = 19,767.38 × 7,640.82
4. Step 4: Simplify right side
   13,199.19x = 151,038,954.25
5. Step 5: Solve for x
   x = 151,038,954.25/13,199.19
6. Step 6: Final answer
   x = 11,443.05