Finding the Fourth Proportional to 2,117.96, 2,923.06 and 1,186.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,117.96 : 2,923.06 = 1,186.76 : x
2. Step 2: Convert to fraction form
   2,117.96/2,923.06 = 1,186.76/x
3. Step 3: Cross multiply
   2,117.96x = 2,923.06 × 1,186.76
4. Step 4: Simplify right side
   2,117.96x = 3,468,970.69
5. Step 5: Solve for x
   x = 3,468,970.69/2,117.96
6. Step 6: Final answer
   x = 1,637.88