Finding the Fourth Proportional to 139,443.81, 192,432.38 and 75,781.62

Step by Step Solution

1. Step 1: Write the proportion equation
   139,443.81 : 192,432.38 = 75,781.62 : x
2. Step 2: Convert to fraction form
   139,443.81/192,432.38 = 75,781.62/x
3. Step 3: Cross multiply
   139,443.81x = 192,432.38 × 75,781.62
4. Step 4: Simplify right side
   139,443.81x = 14,582,837,117.95
5. Step 5: Solve for x
   x = 14,582,837,117.95/139,443.81
6. Step 6: Final answer
   x = 104,578.59