Finding the Fourth Proportional to 1,048.69, 1,447.50 and 840.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,048.69 : 1,447.50 = 840.32 : x
2. Step 2: Convert to fraction form
   1,048.69/1,447.50 = 840.32/x
3. Step 3: Cross multiply
   1,048.69x = 1,447.50 × 840.32
4. Step 4: Simplify right side
   1,048.69x = 1,216,359.00
5. Step 5: Solve for x
   x = 1,216,359.00/1,048.69
6. Step 6: Final answer
   x = 1,159.88