Finding the Fourth Proportional to 1,436.86, 2,151.87 and 887.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.86 : 2,151.87 = 887.38 : x
2. Step 2: Convert to fraction form
   1,436.86/2,151.87 = 887.38/x
3. Step 3: Cross multiply
   1,436.86x = 2,151.87 × 887.38
4. Step 4: Simplify right side
   1,436.86x = 1,909,526.40
5. Step 5: Solve for x
   x = 1,909,526.40/1,436.86
6. Step 6: Final answer
   x = 1,328.96