Finding the Fourth Proportional to 9,801.78, 13,526.52 and 5,325.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,801.78 : 13,526.52 = 5,325.57 : x
2. Step 2: Convert to fraction form
   9,801.78/13,526.52 = 5,325.57/x
3. Step 3: Cross multiply
   9,801.78x = 13,526.52 × 5,325.57
4. Step 4: Simplify right side
   9,801.78x = 72,036,462.17
5. Step 5: Solve for x
   x = 72,036,462.17/9,801.78
6. Step 6: Final answer
   x = 7,349.32