Finding the Fourth Proportional to 1,109.02, 1,664.56 and 561.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.02 : 1,664.56 = 561.58 : x
2. Step 2: Convert to fraction form
   1,109.02/1,664.56 = 561.58/x
3. Step 3: Cross multiply
   1,109.02x = 1,664.56 × 561.58
4. Step 4: Simplify right side
   1,109.02x = 934,783.60
5. Step 5: Solve for x
   x = 934,783.60/1,109.02
6. Step 6: Final answer
   x = 842.89