Finding the Fourth Proportional to 1,888.31, 2,605.78 and 1,091.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,888.31 : 2,605.78 = 1,091.51 : x
2. Step 2: Convert to fraction form
   1,888.31/2,605.78 = 1,091.51/x
3. Step 3: Cross multiply
   1,888.31x = 2,605.78 × 1,091.51
4. Step 4: Simplify right side
   1,888.31x = 2,844,219.17
5. Step 5: Solve for x
   x = 2,844,219.17/1,888.31
6. Step 6: Final answer
   x = 1,506.23