Finding the Fourth Proportional to 1,885.71, 2,602.50 and 1,140.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,885.71 : 2,602.50 = 1,140.31 : x
2. Step 2: Convert to fraction form
   1,885.71/2,602.50 = 1,140.31/x
3. Step 3: Cross multiply
   1,885.71x = 2,602.50 × 1,140.31
4. Step 4: Simplify right side
   1,885.71x = 2,967,655.75
5. Step 5: Solve for x
   x = 2,967,655.75/1,885.71
6. Step 6: Final answer
   x = 1,573.76