Finding the Fourth Proportional to 1,059.69, 1,457.42 and 928.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059.69 : 1,457.42 = 928.47 : x
2. Step 2: Convert to fraction form
   1,059.69/1,457.42 = 928.47/x
3. Step 3: Cross multiply
   1,059.69x = 1,457.42 × 928.47
4. Step 4: Simplify right side
   1,059.69x = 1,353,166.11
5. Step 5: Solve for x
   x = 1,353,166.11/1,059.69
6. Step 6: Final answer
   x = 1,276.95