Finding the Fourth Proportional to 1,089.60, 1,636.49 and 933.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,089.60 : 1,636.49 = 933.77 : x
2. Step 2: Convert to fraction form
   1,089.60/1,636.49 = 933.77/x
3. Step 3: Cross multiply
   1,089.60x = 1,636.49 × 933.77
4. Step 4: Simplify right side
   1,089.60x = 1,528,111.69
5. Step 5: Solve for x
   x = 1,528,111.69/1,089.60
6. Step 6: Final answer
   x = 1,402.46