Finding the Fourth Proportional to 1,898.56, 2,620.05 and 1,059.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,898.56 : 2,620.05 = 1,059.31 : x
2. Step 2: Convert to fraction form
   1,898.56/2,620.05 = 1,059.31/x
3. Step 3: Cross multiply
   1,898.56x = 2,620.05 × 1,059.31
4. Step 4: Simplify right side
   1,898.56x = 2,775,445.17
5. Step 5: Solve for x
   x = 2,775,445.17/1,898.56
6. Step 6: Final answer
   x = 1,461.87