Finding the Fourth Proportional to 1,338.88, 1,842.72 and 1,173.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.88 : 1,842.72 = 1,173.52 : x
2. Step 2: Convert to fraction form
   1,338.88/1,842.72 = 1,173.52/x
3. Step 3: Cross multiply
   1,338.88x = 1,842.72 × 1,173.52
4. Step 4: Simplify right side
   1,338.88x = 2,162,468.77
5. Step 5: Solve for x
   x = 2,162,468.77/1,338.88
6. Step 6: Final answer
   x = 1,615.13