Finding the Fourth Proportional to 2,111.34, 2,913.80 and 1,227.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.34 : 2,913.80 = 1,227.15 : x
2. Step 2: Convert to fraction form
   2,111.34/2,913.80 = 1,227.15/x
3. Step 3: Cross multiply
   2,111.34x = 2,913.80 × 1,227.15
4. Step 4: Simplify right side
   2,111.34x = 3,575,663.53
5. Step 5: Solve for x
   x = 3,575,663.53/2,111.34
6. Step 6: Final answer
   x = 1,693.55