Finding the Fourth Proportional to 1,839.60, 2,538.72 and 1,053.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,839.60 : 2,538.72 = 1,053.36 : x
2. Step 2: Convert to fraction form
   1,839.60/2,538.72 = 1,053.36/x
3. Step 3: Cross multiply
   1,839.60x = 2,538.72 × 1,053.36
4. Step 4: Simplify right side
   1,839.60x = 2,674,186.10
5. Step 5: Solve for x
   x = 2,674,186.10/1,839.60
6. Step 6: Final answer
   x = 1,453.68