Finding the Fourth Proportional to 1,011.72, 1,516.42 and 492.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,011.72 : 1,516.42 = 492.22 : x
2. Step 2: Convert to fraction form
   1,011.72/1,516.42 = 492.22/x
3. Step 3: Cross multiply
   1,011.72x = 1,516.42 × 492.22
4. Step 4: Simplify right side
   1,011.72x = 746,412.25
5. Step 5: Solve for x
   x = 746,412.25/1,011.72
6. Step 6: Final answer
   x = 737.77