Finding the Fourth Proportional to 2,115.86, 3,174.31 and 729.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,115.86 : 3,174.31 = 729.22 : x
2. Step 2: Convert to fraction form
   2,115.86/3,174.31 = 729.22/x
3. Step 3: Cross multiply
   2,115.86x = 3,174.31 × 729.22
4. Step 4: Simplify right side
   2,115.86x = 2,314,770.34
5. Step 5: Solve for x
   x = 2,314,770.34/2,115.86
6. Step 6: Final answer
   x = 1,094.01