Finding the Fourth Proportional to 1,938.60, 2,675.30 and 1,054.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,938.60 : 2,675.30 = 1,054.42 : x
2. Step 2: Convert to fraction form
   1,938.60/2,675.30 = 1,054.42/x
3. Step 3: Cross multiply
   1,938.60x = 2,675.30 × 1,054.42
4. Step 4: Simplify right side
   1,938.60x = 2,820,889.83
5. Step 5: Solve for x
   x = 2,820,889.83/1,938.60
6. Step 6: Final answer
   x = 1,455.12