Finding the Fourth Proportional to 1,152.21, 1,729.76 and 923.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152.21 : 1,729.76 = 923.94 : x
2. Step 2: Convert to fraction form
   1,152.21/1,729.76 = 923.94/x
3. Step 3: Cross multiply
   1,152.21x = 1,729.76 × 923.94
4. Step 4: Simplify right side
   1,152.21x = 1,598,196.76
5. Step 5: Solve for x
   x = 1,598,196.76/1,152.21
6. Step 6: Final answer
   x = 1,387.07