Finding the Fourth Proportional to 72,438, 99,964.80 and 42,244.26

Step by Step Solution

1. Step 1: Write the proportion equation
   72,438 : 99,964.80 = 42,244.26 : x
2. Step 2: Convert to fraction form
   72,438/99,964.80 = 42,244.26/x
3. Step 3: Cross multiply
   72,438x = 99,964.80 × 42,244.26
4. Step 4: Simplify right side
   72,438x = 4,222,939,002.05
5. Step 5: Solve for x
   x = 4,222,939,002.05/72,438
6. Step 6: Final answer
   x = 58,297.29