Finding the Fourth Proportional to 49,639.50, 74,101.86 and 42,543

Step by Step Solution

1. Step 1: Write the proportion equation
   49,639.50 : 74,101.86 = 42,543 : x
2. Step 2: Convert to fraction form
   49,639.50/74,101.86 = 42,543/x
3. Step 3: Cross multiply
   49,639.50x = 74,101.86 × 42,543
4. Step 4: Simplify right side
   49,639.50x = 3,152,515,429.98
5. Step 5: Solve for x
   x = 3,152,515,429.98/49,639.50
6. Step 6: Final answer
   x = 63,508.20