Finding the Fourth Proportional to 31,076.10, 42,883.88 and 18,996.81

Step by Step Solution

1. Step 1: Write the proportion equation
   31,076.10 : 42,883.88 = 18,996.81 : x
2. Step 2: Convert to fraction form
   31,076.10/42,883.88 = 18,996.81/x
3. Step 3: Cross multiply
   31,076.10x = 42,883.88 × 18,996.81
4. Step 4: Simplify right side
   31,076.10x = 814,657,095.14
5. Step 5: Solve for x
   x = 814,657,095.14/31,076.10
6. Step 6: Final answer
   x = 26,214.91