Finding the Fourth Proportional to 73,513.60, 101,448.72 and 39,979.84

Step by Step Solution

1. Step 1: Write the proportion equation
   73,513.60 : 101,448.72 = 39,979.84 : x
2. Step 2: Convert to fraction form
   73,513.60/101,448.72 = 39,979.84/x
3. Step 3: Cross multiply
   73,513.60x = 101,448.72 × 39,979.84
4. Step 4: Simplify right side
   73,513.60x = 4,055,903,593.80
5. Step 5: Solve for x
   x = 4,055,903,593.80/73,513.60
6. Step 6: Final answer
   x = 55,172.15