Finding the Fourth Proportional to 9,894.71, 13,654.69 and 5,418.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,894.71 : 13,654.69 = 5,418.55 : x
2. Step 2: Convert to fraction form
   9,894.71/13,654.69 = 5,418.55/x
3. Step 3: Cross multiply
   9,894.71x = 13,654.69 × 5,418.55
4. Step 4: Simplify right side
   9,894.71x = 73,988,547.21
5. Step 5: Solve for x
   x = 73,988,547.21/9,894.71
6. Step 6: Final answer
   x = 7,477.59