Finding the Fourth Proportional to 72,450.02, 99,987.54 and 42,245.12

Step by Step Solution

1. Step 1: Write the proportion equation
   72,450.02 : 99,987.54 = 42,245.12 : x
2. Step 2: Convert to fraction form
   72,450.02/99,987.54 = 42,245.12/x
3. Step 3: Cross multiply
   72,450.02x = 99,987.54 × 42,245.12
4. Step 4: Simplify right side
   72,450.02x = 4,223,985,625.80
5. Step 5: Solve for x
   x = 4,223,985,625.80/72,450.02
6. Step 6: Final answer
   x = 58,302.06