Finding the Fourth Proportional to 3,890.88, 5,830.56 and 3,602.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,890.88 : 5,830.56 = 3,602.88 : x
2. Step 2: Convert to fraction form
   3,890.88/5,830.56 = 3,602.88/x
3. Step 3: Cross multiply
   3,890.88x = 5,830.56 × 3,602.88
4. Step 4: Simplify right side
   3,890.88x = 21,006,808.01
5. Step 5: Solve for x
   x = 21,006,808.01/3,890.88
6. Step 6: Final answer
   x = 5,398.99