Finding the Fourth Proportional to 11,618.84, 17,422.80 and 4,221.32

Step by Step Solution

1. Step 1: Write the proportion equation
   11,618.84 : 17,422.80 = 4,221.32 : x
2. Step 2: Convert to fraction form
   11,618.84/17,422.80 = 4,221.32/x
3. Step 3: Cross multiply
   11,618.84x = 17,422.80 × 4,221.32
4. Step 4: Simplify right side
   11,618.84x = 73,547,111.15
5. Step 5: Solve for x
   x = 73,547,111.15/11,618.84
6. Step 6: Final answer
   x = 6,329.99