Finding the Fourth Proportional to 31,077.07, 42,885.86 and 16,929.81

Step by Step Solution

1. Step 1: Write the proportion equation
   31,077.07 : 42,885.86 = 16,929.81 : x
2. Step 2: Convert to fraction form
   31,077.07/42,885.86 = 16,929.81/x
3. Step 3: Cross multiply
   31,077.07x = 42,885.86 × 16,929.81
4. Step 4: Simplify right side
   31,077.07x = 726,049,376.84
5. Step 5: Solve for x
   x = 726,049,376.84/31,077.07
6. Step 6: Final answer
   x = 23,362.87