Finding the Fourth Proportional to 31,071.18, 42,878.43 and 16,924.08

Step by Step Solution

1. Step 1: Write the proportion equation
   31,071.18 : 42,878.43 = 16,924.08 : x
2. Step 2: Convert to fraction form
   31,071.18/42,878.43 = 16,924.08/x
3. Step 3: Cross multiply
   31,071.18x = 42,878.43 × 16,924.08
4. Step 4: Simplify right side
   31,071.18x = 725,677,979.59
5. Step 5: Solve for x
   x = 725,677,979.59/31,071.18
6. Step 6: Final answer
   x = 23,355.34