Finding the Fourth Proportional to 72,363.12, 99,864.18 and 42,143.58

Step by Step Solution

1. Step 1: Write the proportion equation
   72,363.12 : 99,864.18 = 42,143.58 : x
2. Step 2: Convert to fraction form
   72,363.12/99,864.18 = 42,143.58/x
3. Step 3: Cross multiply
   72,363.12x = 99,864.18 × 42,143.58
4. Step 4: Simplify right side
   72,363.12x = 4,208,634,058.96
5. Step 5: Solve for x
   x = 4,208,634,058.96/72,363.12
6. Step 6: Final answer
   x = 58,159.93