Finding the Fourth Proportional to 1,385.63, 2,076.71 and 692.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.63 : 2,076.71 = 692.49 : x
2. Step 2: Convert to fraction form
   1,385.63/2,076.71 = 692.49/x
3. Step 3: Cross multiply
   1,385.63x = 2,076.71 × 692.49
4. Step 4: Simplify right side
   1,385.63x = 1,438,100.91
5. Step 5: Solve for x
   x = 1,438,100.91/1,385.63
6. Step 6: Final answer
   x = 1,037.87