Finding the Fourth Proportional to 1,333.48, 1,997.18 and 920.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,333.48 : 1,997.18 = 920.74 : x
2. Step 2: Convert to fraction form
   1,333.48/1,997.18 = 920.74/x
3. Step 3: Cross multiply
   1,333.48x = 1,997.18 × 920.74
4. Step 4: Simplify right side
   1,333.48x = 1,838,883.51
5. Step 5: Solve for x
   x = 1,838,883.51/1,333.48
6. Step 6: Final answer
   x = 1,379.01