Finding the Fourth Proportional to 31,106.90, 42,927.51 and 17,678.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,106.90 : 42,927.51 = 17,678.18 : x
2. Step 2: Convert to fraction form
   31,106.90/42,927.51 = 17,678.18/x
3. Step 3: Cross multiply
   31,106.90x = 42,927.51 × 17,678.18
4. Step 4: Simplify right side
   31,106.90x = 758,880,248.73
5. Step 5: Solve for x
   x = 758,880,248.73/31,106.90
6. Step 6: Final answer
   x = 24,395.88