Finding the Fourth Proportional to 2,100.74, 3,146.80 and 1,059.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.74 : 3,146.80 = 1,059.28 : x
2. Step 2: Convert to fraction form
   2,100.74/3,146.80 = 1,059.28/x
3. Step 3: Cross multiply
   2,100.74x = 3,146.80 × 1,059.28
4. Step 4: Simplify right side
   2,100.74x = 3,333,333.77
5. Step 5: Solve for x
   x = 3,333,333.77/2,100.74
6. Step 6: Final answer
   x = 1,586.75