Finding the Fourth Proportional to 1,109.60, 1,664.34 and 530.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.60 : 1,664.34 = 530.72 : x
2. Step 2: Convert to fraction form
   1,109.60/1,664.34 = 530.72/x
3. Step 3: Cross multiply
   1,109.60x = 1,664.34 × 530.72
4. Step 4: Simplify right side
   1,109.60x = 883,298.52
5. Step 5: Solve for x
   x = 883,298.52/1,109.60
6. Step 6: Final answer
   x = 796.05