Finding the Fourth Proportional to 9,913.68, 13,680.89 and 5,437.46

Step by Step Solution

1. Step 1: Write the proportion equation
   9,913.68 : 13,680.89 = 5,437.46 : x
2. Step 2: Convert to fraction form
   9,913.68/13,680.89 = 5,437.46/x
3. Step 3: Cross multiply
   9,913.68x = 13,680.89 × 5,437.46
4. Step 4: Simplify right side
   9,913.68x = 74,389,365.59
5. Step 5: Solve for x
   x = 74,389,365.59/9,913.68
6. Step 6: Final answer
   x = 7,503.71