Finding the Fourth Proportional to 2,186.31, 3,015.56 and 2,113.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.31 : 3,015.56 = 2,113.98 : x
2. Step 2: Convert to fraction form
   2,186.31/3,015.56 = 2,113.98/x
3. Step 3: Cross multiply
   2,186.31x = 3,015.56 × 2,113.98
4. Step 4: Simplify right side
   2,186.31x = 6,374,833.53
5. Step 5: Solve for x
   x = 6,374,833.53/2,186.31
6. Step 6: Final answer
   x = 2,915.80