Finding the Fourth Proportional to 72,443.61, 99,963.05 and 42,238.71

Step by Step Solution

1. Step 1: Write the proportion equation
   72,443.61 : 99,963.05 = 42,238.71 : x
2. Step 2: Convert to fraction form
   72,443.61/99,963.05 = 42,238.71/x
3. Step 3: Cross multiply
   72,443.61x = 99,963.05 × 42,238.71
4. Step 4: Simplify right side
   72,443.61x = 4,222,310,068.47
5. Step 5: Solve for x
   x = 4,222,310,068.47/72,443.61
6. Step 6: Final answer
   x = 58,284.09