Finding the Fourth Proportional to 139,499.34, 192,411.63 and 91,737.42

Step by Step Solution

1. Step 1: Write the proportion equation
   139,499.34 : 192,411.63 = 91,737.42 : x
2. Step 2: Convert to fraction form
   139,499.34/192,411.63 = 91,737.42/x
3. Step 3: Cross multiply
   139,499.34x = 192,411.63 × 91,737.42
4. Step 4: Simplify right side
   139,499.34x = 17,651,346,514.19
5. Step 5: Solve for x
   x = 17,651,346,514.19/139,499.34
6. Step 6: Final answer
   x = 126,533.55