Finding the Fourth Proportional to 9,780.57, 13,495.89 and 5,532.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,780.57 : 13,495.89 = 5,532.21 : x
2. Step 2: Convert to fraction form
   9,780.57/13,495.89 = 5,532.21/x
3. Step 3: Cross multiply
   9,780.57x = 13,495.89 × 5,532.21
4. Step 4: Simplify right side
   9,780.57x = 74,662,097.62
5. Step 5: Solve for x
   x = 74,662,097.62/9,780.57
6. Step 6: Final answer
   x = 7,633.72