Finding the Fourth Proportional to 1,200.30, 1,791.74 and 1,054.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.30 : 1,791.74 = 1,054.50 : x
2. Step 2: Convert to fraction form
   1,200.30/1,791.74 = 1,054.50/x
3. Step 3: Cross multiply
   1,200.30x = 1,791.74 × 1,054.50
4. Step 4: Simplify right side
   1,200.30x = 1,889,384.56
5. Step 5: Solve for x
   x = 1,889,384.56/1,200.30
6. Step 6: Final answer
   x = 1,574.09