Finding the Fourth Proportional to 9,870.06, 13,621.86 and 5,622.66

Step by Step Solution

1. Step 1: Write the proportion equation
   9,870.06 : 13,621.86 = 5,622.66 : x
2. Step 2: Convert to fraction form
   9,870.06/13,621.86 = 5,622.66/x
3. Step 3: Cross multiply
   9,870.06x = 13,621.86 × 5,622.66
4. Step 4: Simplify right side
   9,870.06x = 76,591,087.35
5. Step 5: Solve for x
   x = 76,591,087.35/9,870.06
6. Step 6: Final answer
   x = 7,759.94