Finding the Fourth Proportional to 31,108, 42,929.04 and 19,930

Step by Step Solution

1. Step 1: Write the proportion equation
   31,108 : 42,929.04 = 19,930 : x
2. Step 2: Convert to fraction form
   31,108/42,929.04 = 19,930/x
3. Step 3: Cross multiply
   31,108x = 42,929.04 × 19,930
4. Step 4: Simplify right side
   31,108x = 855,575,767.20
5. Step 5: Solve for x
   x = 855,575,767.20/31,108
6. Step 6: Final answer
   x = 27,503.40