Finding the Fourth Proportional to 1,670.64, 2,517.24 and 1,384.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,670.64 : 2,517.24 = 1,384.50 : x
2. Step 2: Convert to fraction form
   1,670.64/2,517.24 = 1,384.50/x
3. Step 3: Cross multiply
   1,670.64x = 2,517.24 × 1,384.50
4. Step 4: Simplify right side
   1,670.64x = 3,485,111.86
5. Step 5: Solve for x
   x = 3,485,111.86/1,670.64
6. Step 6: Final answer
   x = 2,086.09