Finding the Fourth Proportional to 139,492.67, 192,500.15 and 75,830.31

Step by Step Solution

1. Step 1: Write the proportion equation
   139,492.67 : 192,500.15 = 75,830.31 : x
2. Step 2: Convert to fraction form
   139,492.67/192,500.15 = 75,830.31/x
3. Step 3: Cross multiply
   139,492.67x = 192,500.15 × 75,830.31
4. Step 4: Simplify right side
   139,492.67x = 14,597,345,670.40
5. Step 5: Solve for x
   x = 14,597,345,670.40/139,492.67
6. Step 6: Final answer
   x = 104,645.97