Finding the Fourth Proportional to 1,839.72, 2,538.54 and 1,053.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,839.72 : 2,538.54 = 1,053.60 : x
2. Step 2: Convert to fraction form
   1,839.72/2,538.54 = 1,053.60/x
3. Step 3: Cross multiply
   1,839.72x = 2,538.54 × 1,053.60
4. Step 4: Simplify right side
   1,839.72x = 2,674,605.74
5. Step 5: Solve for x
   x = 2,674,605.74/1,839.72
6. Step 6: Final answer
   x = 1,453.81