Finding the Fourth Proportional to 9,992.16, 13,789.18 and 5,515.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,992.16 : 13,789.18 = 5,515.91 : x
2. Step 2: Convert to fraction form
   9,992.16/13,789.18 = 5,515.91/x
3. Step 3: Cross multiply
   9,992.16x = 13,789.18 × 5,515.91
4. Step 4: Simplify right side
   9,992.16x = 76,059,779.33
5. Step 5: Solve for x
   x = 76,059,779.33/9,992.16
6. Step 6: Final answer
   x = 7,611.95