Finding the Fourth Proportional to 3,985.89, 5,977.62 and 1,904.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,985.89 : 5,977.62 = 1,904.81 : x
2. Step 2: Convert to fraction form
   3,985.89/5,977.62 = 1,904.81/x
3. Step 3: Cross multiply
   3,985.89x = 5,977.62 × 1,904.81
4. Step 4: Simplify right side
   3,985.89x = 11,386,200.46
5. Step 5: Solve for x
   x = 11,386,200.46/3,985.89
6. Step 6: Final answer
   x = 2,856.63