Finding the Fourth Proportional to 1,840.38, 2,539.72 and 1,054.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,840.38 : 2,539.72 = 1,054.47 : x
2. Step 2: Convert to fraction form
   1,840.38/2,539.72 = 1,054.47/x
3. Step 3: Cross multiply
   1,840.38x = 2,539.72 × 1,054.47
4. Step 4: Simplify right side
   1,840.38x = 2,678,058.55
5. Step 5: Solve for x
   x = 2,678,058.55/1,840.38
6. Step 6: Final answer
   x = 1,455.17