Finding the Fourth Proportional to 92,136.88, 138,061.34 and 64,111.69

Step by Step Solution

1. Step 1: Write the proportion equation
   92,136.88 : 138,061.34 = 64,111.69 : x
2. Step 2: Convert to fraction form
   92,136.88/138,061.34 = 64,111.69/x
3. Step 3: Cross multiply
   92,136.88x = 138,061.34 × 64,111.69
4. Step 4: Simplify right side
   92,136.88x = 8,851,345,831.06
5. Step 5: Solve for x
   x = 8,851,345,831.06/92,136.88
6. Step 6: Final answer
   x = 96,067.35