Finding the Fourth Proportional to 139,071.96, 192,024.54 and 85,430.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,071.96 : 192,024.54 = 85,430.52 : x
2. Step 2: Convert to fraction form
   139,071.96/192,024.54 = 85,430.52/x
3. Step 3: Cross multiply
   139,071.96x = 192,024.54 × 85,430.52
4. Step 4: Simplify right side
   139,071.96x = 16,404,756,304.96
5. Step 5: Solve for x
   x = 16,404,756,304.96/139,071.96
6. Step 6: Final answer
   x = 117,958.76