Finding the Fourth Proportional to 1,528.73, 2,109.83 and 899.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.73 : 2,109.83 = 899.50 : x
2. Step 2: Convert to fraction form
   1,528.73/2,109.83 = 899.50/x
3. Step 3: Cross multiply
   1,528.73x = 2,109.83 × 899.50
4. Step 4: Simplify right side
   1,528.73x = 1,897,792.09
5. Step 5: Solve for x
   x = 1,897,792.09/1,528.73
6. Step 6: Final answer
   x = 1,241.42