Finding the Fourth Proportional to 1,888.32, 2,606.40 and 1,142.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,888.32 : 2,606.40 = 1,142.16 : x
2. Step 2: Convert to fraction form
   1,888.32/2,606.40 = 1,142.16/x
3. Step 3: Cross multiply
   1,888.32x = 2,606.40 × 1,142.16
4. Step 4: Simplify right side
   1,888.32x = 2,976,925.82
5. Step 5: Solve for x
   x = 2,976,925.82/1,888.32
6. Step 6: Final answer
   x = 1,576.49