Finding the Fourth Proportional to 1,667.90, 2,503.35 and 888.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.90 : 2,503.35 = 888.55 : x
2. Step 2: Convert to fraction form
   1,667.90/2,503.35 = 888.55/x
3. Step 3: Cross multiply
   1,667.90x = 2,503.35 × 888.55
4. Step 4: Simplify right side
   1,667.90x = 2,224,345.38
5. Step 5: Solve for x
   x = 2,224,345.38/1,667.90
6. Step 6: Final answer
   x = 1,333.62