Finding the Fourth Proportional to 72,443.63, 99,972.56 and 42,249.89

Step by Step Solution

1. Step 1: Write the proportion equation
   72,443.63 : 99,972.56 = 42,249.89 : x
2. Step 2: Convert to fraction form
   72,443.63/99,972.56 = 42,249.89/x
3. Step 3: Cross multiply
   72,443.63x = 99,972.56 × 42,249.89
4. Step 4: Simplify right side
   72,443.63x = 4,223,829,268.78
5. Step 5: Solve for x
   x = 4,223,829,268.78/72,443.63
6. Step 6: Final answer
   x = 58,305.05