Finding the Fourth Proportional to 9,986.22, 13,780.89 and 5,510.01

Step by Step Solution

1. Step 1: Write the proportion equation
   9,986.22 : 13,780.89 = 5,510.01 : x
2. Step 2: Convert to fraction form
   9,986.22/13,780.89 = 5,510.01/x
3. Step 3: Cross multiply
   9,986.22x = 13,780.89 × 5,510.01
4. Step 4: Simplify right side
   9,986.22x = 75,932,841.71
5. Step 5: Solve for x
   x = 75,932,841.71/9,986.22
6. Step 6: Final answer
   x = 7,603.76