Finding the Fourth Proportional to 72,570.96, 108,839.88 and 19,985.04

Step by Step Solution

1. Step 1: Write the proportion equation
   72,570.96 : 108,839.88 = 19,985.04 : x
2. Step 2: Convert to fraction form
   72,570.96/108,839.88 = 19,985.04/x
3. Step 3: Cross multiply
   72,570.96x = 108,839.88 × 19,985.04
4. Step 4: Simplify right side
   72,570.96x = 2,175,169,355.40
5. Step 5: Solve for x
   x = 2,175,169,355.40/72,570.96
6. Step 6: Final answer
   x = 29,973.00