Finding the Fourth Proportional to 139,136.02, 192,012.42 and 81,774.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,136.02 : 192,012.42 = 81,774.52 : x
2. Step 2: Convert to fraction form
   139,136.02/192,012.42 = 81,774.52/x
3. Step 3: Cross multiply
   139,136.02x = 192,012.42 × 81,774.52
4. Step 4: Simplify right side
   139,136.02x = 15,701,723,479.54
5. Step 5: Solve for x
   x = 15,701,723,479.54/139,136.02
6. Step 6: Final answer
   x = 112,851.61