Finding the Fourth Proportional to 9,821.32, 13,553.70 and 5,572.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,821.32 : 13,553.70 = 5,572.30 : x
2. Step 2: Convert to fraction form
   9,821.32/13,553.70 = 5,572.30/x
3. Step 3: Cross multiply
   9,821.32x = 13,553.70 × 5,572.30
4. Step 4: Simplify right side
   9,821.32x = 75,525,282.51
5. Step 5: Solve for x
   x = 75,525,282.51/9,821.32
6. Step 6: Final answer
   x = 7,689.93