Finding the Fourth Proportional to 1,875.69, 2,588.40 and 1,089.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,875.69 : 2,588.40 = 1,089.72 : x
2. Step 2: Convert to fraction form
   1,875.69/2,588.40 = 1,089.72/x
3. Step 3: Cross multiply
   1,875.69x = 2,588.40 × 1,089.72
4. Step 4: Simplify right side
   1,875.69x = 2,820,631.25
5. Step 5: Solve for x
   x = 2,820,631.25/1,875.69
6. Step 6: Final answer
   x = 1,503.78