Finding the Fourth Proportional to 1,885.67, 2,601.51 and 1,389.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,885.67 : 2,601.51 = 1,389.50 : x
2. Step 2: Convert to fraction form
   1,885.67/2,601.51 = 1,389.50/x
3. Step 3: Cross multiply
   1,885.67x = 2,601.51 × 1,389.50
4. Step 4: Simplify right side
   1,885.67x = 3,614,790.35
5. Step 5: Solve for x
   x = 3,614,790.35/1,885.67
6. Step 6: Final answer
   x = 1,916.98