Finding the Fourth Proportional to 42,117.50, 63,181.37 and 12,933.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,117.50 : 63,181.37 = 12,933.50 : x
2. Step 2: Convert to fraction form
   42,117.50/63,181.37 = 12,933.50/x
3. Step 3: Cross multiply
   42,117.50x = 63,181.37 × 12,933.50
4. Step 4: Simplify right side
   42,117.50x = 817,156,248.90
5. Step 5: Solve for x
   x = 817,156,248.90/42,117.50
6. Step 6: Final answer
   x = 19,401.82