Finding the Fourth Proportional to 7,002.20, 10,505.54 and 2,071.88

Step by Step Solution

1. Step 1: Write the proportion equation
   7,002.20 : 10,505.54 = 2,071.88 : x
2. Step 2: Convert to fraction form
   7,002.20/10,505.54 = 2,071.88/x
3. Step 3: Cross multiply
   7,002.20x = 10,505.54 × 2,071.88
4. Step 4: Simplify right side
   7,002.20x = 21,766,218.22
5. Step 5: Solve for x
   x = 21,766,218.22/7,002.20
6. Step 6: Final answer
   x = 3,108.48