Finding the Fourth Proportional to 1,530.08, 2,110.72 and 900.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.08 : 2,110.72 = 900.30 : x
2. Step 2: Convert to fraction form
   1,530.08/2,110.72 = 900.30/x
3. Step 3: Cross multiply
   1,530.08x = 2,110.72 × 900.30
4. Step 4: Simplify right side
   1,530.08x = 1,900,281.22
5. Step 5: Solve for x
   x = 1,900,281.22/1,530.08
6. Step 6: Final answer
   x = 1,241.95