Finding the Fourth Proportional to 31,096.78, 42,914.72 and 17,670.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,096.78 : 42,914.72 = 17,670.31 : x
2. Step 2: Convert to fraction form
   31,096.78/42,914.72 = 17,670.31/x
3. Step 3: Cross multiply
   31,096.78x = 42,914.72 × 17,670.31
4. Step 4: Simplify right side
   31,096.78x = 758,316,342.85
5. Step 5: Solve for x
   x = 758,316,342.85/31,096.78
6. Step 6: Final answer
   x = 24,385.69