Finding the Fourth Proportional to 9,971.78, 13,760.88 and 5,434.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,971.78 : 13,760.88 = 5,434.52 : x
2. Step 2: Convert to fraction form
   9,971.78/13,760.88 = 5,434.52/x
3. Step 3: Cross multiply
   9,971.78x = 13,760.88 × 5,434.52
4. Step 4: Simplify right side
   9,971.78x = 74,783,708.77
5. Step 5: Solve for x
   x = 74,783,708.77/9,971.78
6. Step 6: Final answer
   x = 7,499.54