Finding the Fourth Proportional to 1,053.86, 1,453.86 and 661.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.86 : 1,453.86 = 661.01 : x
2. Step 2: Convert to fraction form
   1,053.86/1,453.86 = 661.01/x
3. Step 3: Cross multiply
   1,053.86x = 1,453.86 × 661.01
4. Step 4: Simplify right side
   1,053.86x = 961,008.73
5. Step 5: Solve for x
   x = 961,008.73/1,053.86
6. Step 6: Final answer
   x = 911.90