Finding the Fourth Proportional to 3,422.90, 5,134.72 and 1,113.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,422.90 : 5,134.72 = 1,113.86 : x
2. Step 2: Convert to fraction form
   3,422.90/5,134.72 = 1,113.86/x
3. Step 3: Cross multiply
   3,422.90x = 5,134.72 × 1,113.86
4. Step 4: Simplify right side
   3,422.90x = 5,719,359.22
5. Step 5: Solve for x
   x = 5,719,359.22/3,422.90
6. Step 6: Final answer
   x = 1,670.91