Finding the Fourth Proportional to 3,875.78, 5,803.38 and 3,090.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,875.78 : 5,803.38 = 3,090.56 : x
2. Step 2: Convert to fraction form
   3,875.78/5,803.38 = 3,090.56/x
3. Step 3: Cross multiply
   3,875.78x = 5,803.38 × 3,090.56
4. Step 4: Simplify right side
   3,875.78x = 17,935,665.08
5. Step 5: Solve for x
   x = 17,935,665.08/3,875.78
6. Step 6: Final answer
   x = 4,627.62