Finding the Fourth Proportional to 1,111.72, 1,534.11 and 614.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.72 : 1,534.11 = 614.35 : x
2. Step 2: Convert to fraction form
   1,111.72/1,534.11 = 614.35/x
3. Step 3: Cross multiply
   1,111.72x = 1,534.11 × 614.35
4. Step 4: Simplify right side
   1,111.72x = 942,477.41
5. Step 5: Solve for x
   x = 942,477.41/1,111.72
6. Step 6: Final answer
   x = 847.77