Finding the Fourth Proportional to 1,333.34, 1,990.42 and 1,059.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,333.34 : 1,990.42 = 1,059.05 : x
2. Step 2: Convert to fraction form
   1,333.34/1,990.42 = 1,059.05/x
3. Step 3: Cross multiply
   1,333.34x = 1,990.42 × 1,059.05
4. Step 4: Simplify right side
   1,333.34x = 2,107,954.30
5. Step 5: Solve for x
   x = 2,107,954.30/1,333.34
6. Step 6: Final answer
   x = 1,580.96