Finding the Fourth Proportional to 72,341.91, 108,378 and 42,671.61

Step by Step Solution

1. Step 1: Write the proportion equation
   72,341.91 : 108,378 = 42,671.61 : x
2. Step 2: Convert to fraction form
   72,341.91/108,378 = 42,671.61/x
3. Step 3: Cross multiply
   72,341.91x = 108,378 × 42,671.61
4. Step 4: Simplify right side
   72,341.91x = 4,624,663,748.58
5. Step 5: Solve for x
   x = 4,624,663,748.58/72,341.91
6. Step 6: Final answer
   x = 63,927.86