Finding the Fourth Proportional to 2,073.33, 3,109.71 and 612.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,073.33 : 3,109.71 = 612.63 : x
2. Step 2: Convert to fraction form
   2,073.33/3,109.71 = 612.63/x
3. Step 3: Cross multiply
   2,073.33x = 3,109.71 × 612.63
4. Step 4: Simplify right side
   2,073.33x = 1,905,101.64
5. Step 5: Solve for x
   x = 1,905,101.64/2,073.33
6. Step 6: Final answer
   x = 918.86