Finding the Fourth Proportional to 1,667.97, 2,501.76 and 435.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.97 : 2,501.76 = 435.50 : x
2. Step 2: Convert to fraction form
   1,667.97/2,501.76 = 435.50/x
3. Step 3: Cross multiply
   1,667.97x = 2,501.76 × 435.50
4. Step 4: Simplify right side
   1,667.97x = 1,089,520.80
5. Step 5: Solve for x
   x = 1,089,520.80/1,667.97
6. Step 6: Final answer
   x = 653.20