Finding the Fourth Proportional to 5,725.32, 7,841.72 and 5,389.08

Step by Step Solution

1. Step 1: Write the proportion equation
   5,725.32 : 7,841.72 = 5,389.08 : x
2. Step 2: Convert to fraction form
   5,725.32/7,841.72 = 5,389.08/x
3. Step 3: Cross multiply
   5,725.32x = 7,841.72 × 5,389.08
4. Step 4: Simplify right side
   5,725.32x = 42,259,656.42
5. Step 5: Solve for x
   x = 42,259,656.42/5,725.32
6. Step 6: Final answer
   x = 7,381.19