Finding the Fourth Proportional to 1,383.48, 2,075.31 and 899.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.48 : 2,075.31 = 899.61 : x
2. Step 2: Convert to fraction form
   1,383.48/2,075.31 = 899.61/x
3. Step 3: Cross multiply
   1,383.48x = 2,075.31 × 899.61
4. Step 4: Simplify right side
   1,383.48x = 1,866,969.63
5. Step 5: Solve for x
   x = 1,866,969.63/1,383.48
6. Step 6: Final answer
   x = 1,349.47