Finding the Fourth Proportional to 139,900.10, 193,062.15 and 76,237.88

Step by Step Solution

1. Step 1: Write the proportion equation
   139,900.10 : 193,062.15 = 76,237.88 : x
2. Step 2: Convert to fraction form
   139,900.10/193,062.15 = 76,237.88/x
3. Step 3: Cross multiply
   139,900.10x = 193,062.15 × 76,237.88
4. Step 4: Simplify right side
   139,900.10x = 14,718,648,058.93
5. Step 5: Solve for x
   x = 14,718,648,058.93/139,900.10
6. Step 6: Final answer
   x = 105,208.28