Finding the Fourth Proportional to 2,073.42, 3,109.78 and 612.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,073.42 : 3,109.78 = 612.22 : x
2. Step 2: Convert to fraction form
   2,073.42/3,109.78 = 612.22/x
3. Step 3: Cross multiply
   2,073.42x = 3,109.78 × 612.22
4. Step 4: Simplify right side
   2,073.42x = 1,903,866.45
5. Step 5: Solve for x
   x = 1,903,866.45/2,073.42
6. Step 6: Final answer
   x = 918.23