Finding the Fourth Proportional to 11,871.50, 17,812.01 and 4,478.04

Step by Step Solution

1. Step 1: Write the proportion equation
   11,871.50 : 17,812.01 = 4,478.04 : x
2. Step 2: Convert to fraction form
   11,871.50/17,812.01 = 4,478.04/x
3. Step 3: Cross multiply
   11,871.50x = 17,812.01 × 4,478.04
4. Step 4: Simplify right side
   11,871.50x = 79,762,904.46
5. Step 5: Solve for x
   x = 79,762,904.46/11,871.50
6. Step 6: Final answer
   x = 6,718.86