Finding the Fourth Proportional to 4,978.78, 7,462.96 and 1,857.53

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.78 : 7,462.96 = 1,857.53 : x
2. Step 2: Convert to fraction form
   4,978.78/7,462.96 = 1,857.53/x
3. Step 3: Cross multiply
   4,978.78x = 7,462.96 × 1,857.53
4. Step 4: Simplify right side
   4,978.78x = 13,862,672.09
5. Step 5: Solve for x
   x = 13,862,672.09/4,978.78
6. Step 6: Final answer
   x = 2,784.35