Finding the Fourth Proportional to 1,086.21, 1,624.05 and 933.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.21 : 1,624.05 = 933.93 : x
2. Step 2: Convert to fraction form
   1,086.21/1,624.05 = 933.93/x
3. Step 3: Cross multiply
   1,086.21x = 1,624.05 × 933.93
4. Step 4: Simplify right side
   1,086.21x = 1,516,749.02
5. Step 5: Solve for x
   x = 1,516,749.02/1,086.21
6. Step 6: Final answer
   x = 1,396.37