Finding the Fourth Proportional to 31,411.76, 47,119.93 and 11,690.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,411.76 : 47,119.93 = 11,690.31 : x
2. Step 2: Convert to fraction form
   31,411.76/47,119.93 = 11,690.31/x
3. Step 3: Cross multiply
   31,411.76x = 47,119.93 × 11,690.31
4. Step 4: Simplify right side
   31,411.76x = 550,846,588.88
5. Step 5: Solve for x
   x = 550,846,588.88/31,411.76
6. Step 6: Final answer
   x = 17,536.32