Finding the Fourth Proportional to 1,376.01, 1,898.78 and 786.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.01 : 1,898.78 = 786.42 : x
2. Step 2: Convert to fraction form
   1,376.01/1,898.78 = 786.42/x
3. Step 3: Cross multiply
   1,376.01x = 1,898.78 × 786.42
4. Step 4: Simplify right side
   1,376.01x = 1,493,238.57
5. Step 5: Solve for x
   x = 1,493,238.57/1,376.01
6. Step 6: Final answer
   x = 1,085.19