Finding the Fourth Proportional to 12,931.68, 19,381.83 and 5,902.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,931.68 : 19,381.83 = 5,902.05 : x
2. Step 2: Convert to fraction form
   12,931.68/19,381.83 = 5,902.05/x
3. Step 3: Cross multiply
   12,931.68x = 19,381.83 × 5,902.05
4. Step 4: Simplify right side
   12,931.68x = 114,392,529.75
5. Step 5: Solve for x
   x = 114,392,529.75/12,931.68
6. Step 6: Final answer
   x = 8,845.91