Finding the Fourth Proportional to 1,376.34, 1,899.39 and 786.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.34 : 1,899.39 = 786.93 : x
2. Step 2: Convert to fraction form
   1,376.34/1,899.39 = 786.93/x
3. Step 3: Cross multiply
   1,376.34x = 1,899.39 × 786.93
4. Step 4: Simplify right side
   1,376.34x = 1,494,686.97
5. Step 5: Solve for x
   x = 1,494,686.97/1,376.34
6. Step 6: Final answer
   x = 1,085.99