Finding the Fourth Proportional to 1,404.05, 2,102.09 and 786.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.05 : 2,102.09 = 786.15 : x
2. Step 2: Convert to fraction form
   1,404.05/2,102.09 = 786.15/x
3. Step 3: Cross multiply
   1,404.05x = 2,102.09 × 786.15
4. Step 4: Simplify right side
   1,404.05x = 1,652,554.12
5. Step 5: Solve for x
   x = 1,652,554.12/1,404.05
6. Step 6: Final answer
   x = 1,177.00