Finding the Fourth Proportional to 1,053.02, 1,578.12 and 436.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.02 : 1,578.12 = 436.37 : x
2. Step 2: Convert to fraction form
   1,053.02/1,578.12 = 436.37/x
3. Step 3: Cross multiply
   1,053.02x = 1,578.12 × 436.37
4. Step 4: Simplify right side
   1,053.02x = 688,636.33
5. Step 5: Solve for x
   x = 688,636.33/1,053.02
6. Step 6: Final answer
   x = 653.97