Finding the Fourth Proportional to 1,100.83, 1,649.98 and 612.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.83 : 1,649.98 = 612.91 : x
2. Step 2: Convert to fraction form
   1,100.83/1,649.98 = 612.91/x
3. Step 3: Cross multiply
   1,100.83x = 1,649.98 × 612.91
4. Step 4: Simplify right side
   1,100.83x = 1,011,289.24
5. Step 5: Solve for x
   x = 1,011,289.24/1,100.83
6. Step 6: Final answer
   x = 918.66