Finding the Fourth Proportional to 11,498.83, 15,869.85 and 7,021.64

Step by Step Solution

1. Step 1: Write the proportion equation
   11,498.83 : 15,869.85 = 7,021.64 : x
2. Step 2: Convert to fraction form
   11,498.83/15,869.85 = 7,021.64/x
3. Step 3: Cross multiply
   11,498.83x = 15,869.85 × 7,021.64
4. Step 4: Simplify right side
   11,498.83x = 111,432,317.38
5. Step 5: Solve for x
   x = 111,432,317.38/11,498.83
6. Step 6: Final answer
   x = 9,690.75