Finding the Fourth Proportional to 1,053.21, 1,453.71 and 633.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.21 : 1,453.71 = 633.59 : x
2. Step 2: Convert to fraction form
   1,053.21/1,453.71 = 633.59/x
3. Step 3: Cross multiply
   1,053.21x = 1,453.71 × 633.59
4. Step 4: Simplify right side
   1,053.21x = 921,056.12
5. Step 5: Solve for x
   x = 921,056.12/1,053.21
6. Step 6: Final answer
   x = 874.52