Finding the Fourth Proportional to 4,742.89, 7,111.80 and 1,455.10

Step by Step Solution

1. Step 1: Write the proportion equation
   4,742.89 : 7,111.80 = 1,455.10 : x
2. Step 2: Convert to fraction form
   4,742.89/7,111.80 = 1,455.10/x
3. Step 3: Cross multiply
   4,742.89x = 7,111.80 × 1,455.10
4. Step 4: Simplify right side
   4,742.89x = 10,348,362.40
5. Step 5: Solve for x
   x = 10,348,362.40/4,742.89
6. Step 6: Final answer
   x = 2,181.87