Finding the Fourth Proportional to 10,047.64, 13,865.68 and 5,571.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,047.64 : 13,865.68 = 5,571.40 : x
2. Step 2: Convert to fraction form
   10,047.64/13,865.68 = 5,571.40/x
3. Step 3: Cross multiply
   10,047.64x = 13,865.68 × 5,571.40
4. Step 4: Simplify right side
   10,047.64x = 77,251,152.37
5. Step 5: Solve for x
   x = 77,251,152.37/10,047.64
6. Step 6: Final answer
   x = 7,688.49