Finding the Fourth Proportional to 139,887, 193,044.15 and 76,224.78

Step by Step Solution

1. Step 1: Write the proportion equation
   139,887 : 193,044.15 = 76,224.78 : x
2. Step 2: Convert to fraction form
   139,887/193,044.15 = 76,224.78/x
3. Step 3: Cross multiply
   139,887x = 193,044.15 × 76,224.78
4. Step 4: Simplify right side
   139,887x = 14,714,747,864.04
5. Step 5: Solve for x
   x = 14,714,747,864.04/139,887
6. Step 6: Final answer
   x = 105,190.25