Finding the Fourth Proportional to 139,908.47, 193,073.83 and 76,246.31

Step by Step Solution

1. Step 1: Write the proportion equation
   139,908.47 : 193,073.83 = 76,246.31 : x
2. Step 2: Convert to fraction form
   139,908.47/193,073.83 = 76,246.31/x
3. Step 3: Cross multiply
   139,908.47x = 193,073.83 × 76,246.31
4. Step 4: Simplify right side
   139,908.47x = 14,721,167,387.14
5. Step 5: Solve for x
   x = 14,721,167,387.14/139,908.47
6. Step 6: Final answer
   x = 105,219.99