Finding the Fourth Proportional to 139,487.12, 192,492.20 and 75,824.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,487.12 : 192,492.20 = 75,824.72 : x
2. Step 2: Convert to fraction form
   139,487.12/192,492.20 = 75,824.72/x
3. Step 3: Cross multiply
   139,487.12x = 192,492.20 × 75,824.72
4. Step 4: Simplify right side
   139,487.12x = 14,595,667,167.18
5. Step 5: Solve for x
   x = 14,595,667,167.18/139,487.12
6. Step 6: Final answer
   x = 104,638.10