Finding the Fourth Proportional to 78,123.06, 107,809.92 and 42,313.37

Step by Step Solution

1. Step 1: Write the proportion equation
   78,123.06 : 107,809.92 = 42,313.37 : x
2. Step 2: Convert to fraction form
   78,123.06/107,809.92 = 42,313.37/x
3. Step 3: Cross multiply
   78,123.06x = 107,809.92 × 42,313.37
4. Step 4: Simplify right side
   78,123.06x = 4,561,800,495.58
5. Step 5: Solve for x
   x = 4,561,800,495.58/78,123.06
6. Step 6: Final answer
   x = 58,392.50