Finding the Fourth Proportional to 140,036.31, 193,247.78 and 76,370.31

Step by Step Solution

1. Step 1: Write the proportion equation
   140,036.31 : 193,247.78 = 76,370.31 : x
2. Step 2: Convert to fraction form
   140,036.31/193,247.78 = 76,370.31/x
3. Step 3: Cross multiply
   140,036.31x = 193,247.78 × 76,370.31
4. Step 4: Simplify right side
   140,036.31x = 14,758,392,483.56
5. Step 5: Solve for x
   x = 14,758,392,483.56/140,036.31
6. Step 6: Final answer
   x = 105,389.76