Finding the Fourth Proportional to 1,847.78, 2,770.86 and 692.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,847.78 : 2,770.86 = 692.72 : x
2. Step 2: Convert to fraction form
   1,847.78/2,770.86 = 692.72/x
3. Step 3: Cross multiply
   1,847.78x = 2,770.86 × 692.72
4. Step 4: Simplify right side
   1,847.78x = 1,919,430.14
5. Step 5: Solve for x
   x = 1,919,430.14/1,847.78
6. Step 6: Final answer
   x = 1,038.78