Finding the Fourth Proportional to 2,100.08, 3,148.20 and 800.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.08 : 3,148.20 = 800.48 : x
2. Step 2: Convert to fraction form
   2,100.08/3,148.20 = 800.48/x
3. Step 3: Cross multiply
   2,100.08x = 3,148.20 × 800.48
4. Step 4: Simplify right side
   2,100.08x = 2,520,071.14
5. Step 5: Solve for x
   x = 2,520,071.14/2,100.08
6. Step 6: Final answer
   x = 1,199.99