Finding the Fourth Proportional to 139,347, 192,302.37 and 75,684.78

Step by Step Solution

1. Step 1: Write the proportion equation
   139,347 : 192,302.37 = 75,684.78 : x
2. Step 2: Convert to fraction form
   139,347/192,302.37 = 75,684.78/x
3. Step 3: Cross multiply
   139,347x = 192,302.37 × 75,684.78
4. Step 4: Simplify right side
   139,347x = 14,554,362,566.93
5. Step 5: Solve for x
   x = 14,554,362,566.93/139,347
6. Step 6: Final answer
   x = 104,446.90