Finding the Fourth Proportional to 1,111.76, 1,664.59 and 801.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.76 : 1,664.59 = 801.93 : x
2. Step 2: Convert to fraction form
   1,111.76/1,664.59 = 801.93/x
3. Step 3: Cross multiply
   1,111.76x = 1,664.59 × 801.93
4. Step 4: Simplify right side
   1,111.76x = 1,334,884.66
5. Step 5: Solve for x
   x = 1,334,884.66/1,111.76
6. Step 6: Final answer
   x = 1,200.69