Finding the Fourth Proportional to 1,113.62, 1,536.86 and 671.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,113.62 : 1,536.86 = 671.59 : x
2. Step 2: Convert to fraction form
   1,113.62/1,536.86 = 671.59/x
3. Step 3: Cross multiply
   1,113.62x = 1,536.86 × 671.59
4. Step 4: Simplify right side
   1,113.62x = 1,032,128.77
5. Step 5: Solve for x
   x = 1,032,128.77/1,113.62
6. Step 6: Final answer
   x = 926.82