Finding the Fourth Proportional to 1,530.04, 2,111.25 and 900.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.04 : 2,111.25 = 900.50 : x
2. Step 2: Convert to fraction form
   1,530.04/2,111.25 = 900.50/x
3. Step 3: Cross multiply
   1,530.04x = 2,111.25 × 900.50
4. Step 4: Simplify right side
   1,530.04x = 1,901,180.63
5. Step 5: Solve for x
   x = 1,901,180.63/1,530.04
6. Step 6: Final answer
   x = 1,242.57