Finding the Fourth Proportional to 1,384.10, 1,910.10 and 786.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.10 : 1,910.10 = 786.59 : x
2. Step 2: Convert to fraction form
   1,384.10/1,910.10 = 786.59/x
3. Step 3: Cross multiply
   1,384.10x = 1,910.10 × 786.59
4. Step 4: Simplify right side
   1,384.10x = 1,502,456.01
5. Step 5: Solve for x
   x = 1,502,456.01/1,384.10
6. Step 6: Final answer
   x = 1,085.52