Finding the Fourth Proportional to 1,436.02, 2,154.58 and 978.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.02 : 2,154.58 = 978.12 : x
2. Step 2: Convert to fraction form
   1,436.02/2,154.58 = 978.12/x
3. Step 3: Cross multiply
   1,436.02x = 2,154.58 × 978.12
4. Step 4: Simplify right side
   1,436.02x = 2,107,435.34
5. Step 5: Solve for x
   x = 2,107,435.34/1,436.02
6. Step 6: Final answer
   x = 1,467.55