Finding the Fourth Proportional to 1,111.76, 1,534.25 and 646.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.76 : 1,534.25 = 646.01 : x
2. Step 2: Convert to fraction form
   1,111.76/1,534.25 = 646.01/x
3. Step 3: Cross multiply
   1,111.76x = 1,534.25 × 646.01
4. Step 4: Simplify right side
   1,111.76x = 991,137.61
5. Step 5: Solve for x
   x = 991,137.61/1,111.76
6. Step 6: Final answer
   x = 891.50