Finding the Fourth Proportional to 78,123.11, 107,810.04 and 42,313.15

Step by Step Solution

1. Step 1: Write the proportion equation
   78,123.11 : 107,810.04 = 42,313.15 : x
2. Step 2: Convert to fraction form
   78,123.11/107,810.04 = 42,313.15/x
3. Step 3: Cross multiply
   78,123.11x = 107,810.04 × 42,313.15
4. Step 4: Simplify right side
   78,123.11x = 4,561,782,394.03
5. Step 5: Solve for x
   x = 4,561,782,394.03/78,123.11
6. Step 6: Final answer
   x = 58,392.23