Finding the Fourth Proportional to 2,381.03, 3,570.55 and 899.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,381.03 : 3,570.55 = 899.99 : x
2. Step 2: Convert to fraction form
   2,381.03/3,570.55 = 899.99/x
3. Step 3: Cross multiply
   2,381.03x = 3,570.55 × 899.99
4. Step 4: Simplify right side
   2,381.03x = 3,213,468.22
5. Step 5: Solve for x
   x = 3,213,468.22/2,381.03
6. Step 6: Final answer
   x = 1,349.62