Finding the Fourth Proportional to 72,415.83, 99,933.62 and 42,219.03

Step by Step Solution

1. Step 1: Write the proportion equation
   72,415.83 : 99,933.62 = 42,219.03 : x
2. Step 2: Convert to fraction form
   72,415.83/99,933.62 = 42,219.03/x
3. Step 3: Cross multiply
   72,415.83x = 99,933.62 × 42,219.03
4. Step 4: Simplify right side
   72,415.83x = 4,219,100,289.69
5. Step 5: Solve for x
   x = 4,219,100,289.69/72,415.83
6. Step 6: Final answer
   x = 58,262.13