Finding the Fourth Proportional to 1,667.98, 2,501.42 and 790.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.98 : 2,501.42 = 790.36 : x
2. Step 2: Convert to fraction form
   1,667.98/2,501.42 = 790.36/x
3. Step 3: Cross multiply
   1,667.98x = 2,501.42 × 790.36
4. Step 4: Simplify right side
   1,667.98x = 1,977,022.31
5. Step 5: Solve for x
   x = 1,977,022.31/1,667.98
6. Step 6: Final answer
   x = 1,185.28