Finding the Fourth Proportional to 78,123.09, 107,809.83 and 42,313.08

Step by Step Solution

1. Step 1: Write the proportion equation
   78,123.09 : 107,809.83 = 42,313.08 : x
2. Step 2: Convert to fraction form
   78,123.09/107,809.83 = 42,313.08/x
3. Step 3: Cross multiply
   78,123.09x = 107,809.83 × 42,313.08
4. Step 4: Simplify right side
   78,123.09x = 4,561,765,961.58
5. Step 5: Solve for x
   x = 4,561,765,961.58/78,123.09
6. Step 6: Final answer
   x = 58,392.03