Finding the Fourth Proportional to 9,913.72, 13,680.84 and 5,437.38

Step by Step Solution

1. Step 1: Write the proportion equation
   9,913.72 : 13,680.84 = 5,437.38 : x
2. Step 2: Convert to fraction form
   9,913.72/13,680.84 = 5,437.38/x
3. Step 3: Cross multiply
   9,913.72x = 13,680.84 × 5,437.38
4. Step 4: Simplify right side
   9,913.72x = 74,387,925.80
5. Step 5: Solve for x
   x = 74,387,925.80/9,913.72
6. Step 6: Final answer
   x = 7,503.53