Finding the Fourth Proportional to 31,106.49, 46,667.78 and 8,921.49

Step by Step Solution

1. Step 1: Write the proportion equation
   31,106.49 : 46,667.78 = 8,921.49 : x
2. Step 2: Convert to fraction form
   31,106.49/46,667.78 = 8,921.49/x
3. Step 3: Cross multiply
   31,106.49x = 46,667.78 × 8,921.49
4. Step 4: Simplify right side
   31,106.49x = 416,346,132.59
5. Step 5: Solve for x
   x = 416,346,132.59/31,106.49
6. Step 6: Final answer
   x = 13,384.54