Finding the Fourth Proportional to 139,407.48, 192,381.89 and 75,745.53

Step by Step Solution

1. Step 1: Write the proportion equation
   139,407.48 : 192,381.89 = 75,745.53 : x
2. Step 2: Convert to fraction form
   139,407.48/192,381.89 = 75,745.53/x
3. Step 3: Cross multiply
   139,407.48x = 192,381.89 × 75,745.53
4. Step 4: Simplify right side
   139,407.48x = 14,572,067,841.72
5. Step 5: Solve for x
   x = 14,572,067,841.72/139,407.48
6. Step 6: Final answer
   x = 104,528.59