Finding the Fourth Proportional to 73,990, 102,081.24 and 42,136.36

Step by Step Solution

1. Step 1: Write the proportion equation
   73,990 : 102,081.24 = 42,136.36 : x
2. Step 2: Convert to fraction form
   73,990/102,081.24 = 42,136.36/x
3. Step 3: Cross multiply
   73,990x = 102,081.24 × 42,136.36
4. Step 4: Simplify right side
   73,990x = 4,301,331,877.89
5. Step 5: Solve for x
   x = 4,301,331,877.89/73,990
6. Step 6: Final answer
   x = 58,133.96