Finding the Fourth Proportional to 1,376.05, 1,898.95 and 786.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.05 : 1,898.95 = 786.59 : x
2. Step 2: Convert to fraction form
   1,376.05/1,898.95 = 786.59/x
3. Step 3: Cross multiply
   1,376.05x = 1,898.95 × 786.59
4. Step 4: Simplify right side
   1,376.05x = 1,493,685.59
5. Step 5: Solve for x
   x = 1,493,685.59/1,376.05
6. Step 6: Final answer
   x = 1,085.49