Finding the Fourth Proportional to 31,298.48, 43,168.29 and 21,738.35

Step by Step Solution

1. Step 1: Write the proportion equation
   31,298.48 : 43,168.29 = 21,738.35 : x
2. Step 2: Convert to fraction form
   31,298.48/43,168.29 = 21,738.35/x
3. Step 3: Cross multiply
   31,298.48x = 43,168.29 × 21,738.35
4. Step 4: Simplify right side
   31,298.48x = 938,407,424.19
5. Step 5: Solve for x
   x = 938,407,424.19/31,298.48
6. Step 6: Final answer
   x = 29,982.53