Finding the Fourth Proportional to 13,930.71, 19,224.41 and 7,643.13

Step by Step Solution

1. Step 1: Write the proportion equation
   13,930.71 : 19,224.41 = 7,643.13 : x
2. Step 2: Convert to fraction form
   13,930.71/19,224.41 = 7,643.13/x
3. Step 3: Cross multiply
   13,930.71x = 19,224.41 × 7,643.13
4. Step 4: Simplify right side
   13,930.71x = 146,934,626.59
5. Step 5: Solve for x
   x = 146,934,626.59/13,930.71
6. Step 6: Final answer
   x = 10,547.53