Finding the Fourth Proportional to 9,913.71, 13,680.91 and 5,437.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,913.71 : 13,680.91 = 5,437.48 : x
2. Step 2: Convert to fraction form
   9,913.71/13,680.91 = 5,437.48/x
3. Step 3: Cross multiply
   9,913.71x = 13,680.91 × 5,437.48
4. Step 4: Simplify right side
   9,913.71x = 74,389,578.91
5. Step 5: Solve for x
   x = 74,389,578.91/9,913.71
6. Step 6: Final answer
   x = 7,503.71