Finding the Fourth Proportional to 1,667.58, 2,501.91 and 801.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.58 : 2,501.91 = 801.78 : x
2. Step 2: Convert to fraction form
   1,667.58/2,501.91 = 801.78/x
3. Step 3: Cross multiply
   1,667.58x = 2,501.91 × 801.78
4. Step 4: Simplify right side
   1,667.58x = 2,005,981.40
5. Step 5: Solve for x
   x = 2,005,981.40/1,667.58
6. Step 6: Final answer
   x = 1,202.93