Finding the Fourth Proportional to 72,448.02, 99,984.78 and 42,243.12

Step by Step Solution

1. Step 1: Write the proportion equation
   72,448.02 : 99,984.78 = 42,243.12 : x
2. Step 2: Convert to fraction form
   72,448.02/99,984.78 = 42,243.12/x
3. Step 3: Cross multiply
   72,448.02x = 99,984.78 × 42,243.12
4. Step 4: Simplify right side
   72,448.02x = 4,223,669,059.71
5. Step 5: Solve for x
   x = 4,223,669,059.71/72,448.02
6. Step 6: Final answer
   x = 58,299.30