Finding the Fourth Proportional to 5,288.90, 7,931.72 and 3,655.94

Step by Step Solution

1. Step 1: Write the proportion equation
   5,288.90 : 7,931.72 = 3,655.94 : x
2. Step 2: Convert to fraction form
   5,288.90/7,931.72 = 3,655.94/x
3. Step 3: Cross multiply
   5,288.90x = 7,931.72 × 3,655.94
4. Step 4: Simplify right side
   5,288.90x = 28,997,892.42
5. Step 5: Solve for x
   x = 28,997,892.42/5,288.90
6. Step 6: Final answer
   x = 5,482.78