Finding the Fourth Proportional to 2,088.77, 2,880.05 and 1,667.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,088.77 : 2,880.05 = 1,667.78 : x
2. Step 2: Convert to fraction form
   2,088.77/2,880.05 = 1,667.78/x
3. Step 3: Cross multiply
   2,088.77x = 2,880.05 × 1,667.78
4. Step 4: Simplify right side
   2,088.77x = 4,803,267.05
5. Step 5: Solve for x
   x = 4,803,267.05/2,088.77
6. Step 6: Final answer
   x = 2,299.57