Finding the Fourth Proportional to 1,372.21, 1,893.67 and 774.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.21 : 1,893.67 = 774.59 : x
2. Step 2: Convert to fraction form
   1,372.21/1,893.67 = 774.59/x
3. Step 3: Cross multiply
   1,372.21x = 1,893.67 × 774.59
4. Step 4: Simplify right side
   1,372.21x = 1,466,817.21
5. Step 5: Solve for x
   x = 1,466,817.21/1,372.21
6. Step 6: Final answer
   x = 1,068.95