Finding the Fourth Proportional to 1,113.65, 1,536.72 and 616.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,113.65 : 1,536.72 = 616.26 : x
2. Step 2: Convert to fraction form
   1,113.65/1,536.72 = 616.26/x
3. Step 3: Cross multiply
   1,113.65x = 1,536.72 × 616.26
4. Step 4: Simplify right side
   1,113.65x = 947,017.34
5. Step 5: Solve for x
   x = 947,017.34/1,113.65
6. Step 6: Final answer
   x = 850.37