Finding the Fourth Proportional to 31,200.84, 46,800.86 and 20,178.36

Step by Step Solution

1. Step 1: Write the proportion equation
   31,200.84 : 46,800.86 = 20,178.36 : x
2. Step 2: Convert to fraction form
   31,200.84/46,800.86 = 20,178.36/x
3. Step 3: Cross multiply
   31,200.84x = 46,800.86 × 20,178.36
4. Step 4: Simplify right side
   31,200.84x = 944,364,500.50
5. Step 5: Solve for x
   x = 944,364,500.50/31,200.84
6. Step 6: Final answer
   x = 30,267.28