Finding the Fourth Proportional to 1,200.10, 1,798.73 and 541.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.10 : 1,798.73 = 541.21 : x
2. Step 2: Convert to fraction form
   1,200.10/1,798.73 = 541.21/x
3. Step 3: Cross multiply
   1,200.10x = 1,798.73 × 541.21
4. Step 4: Simplify right side
   1,200.10x = 973,485.33
5. Step 5: Solve for x
   x = 973,485.33/1,200.10
6. Step 6: Final answer
   x = 811.17