Finding the Fourth Proportional to 2,086.30, 3,130.86 and 1,113.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.30 : 3,130.86 = 1,113.08 : x
2. Step 2: Convert to fraction form
   2,086.30/3,130.86 = 1,113.08/x
3. Step 3: Cross multiply
   2,086.30x = 3,130.86 × 1,113.08
4. Step 4: Simplify right side
   2,086.30x = 3,484,897.65
5. Step 5: Solve for x
   x = 3,484,897.65/2,086.30
6. Step 6: Final answer
   x = 1,670.37