Finding the Fourth Proportional to 1,590.72, 2,196.36 and 1,368.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,590.72 : 2,196.36 = 1,368.38 : x
2. Step 2: Convert to fraction form
   1,590.72/2,196.36 = 1,368.38/x
3. Step 3: Cross multiply
   1,590.72x = 2,196.36 × 1,368.38
4. Step 4: Simplify right side
   1,590.72x = 3,005,444.12
5. Step 5: Solve for x
   x = 3,005,444.12/1,590.72
6. Step 6: Final answer
   x = 1,889.36