Finding the Fourth Proportional to 78,577.09, 108,438.75 and 42,769.42

Step by Step Solution

1. Step 1: Write the proportion equation
   78,577.09 : 108,438.75 = 42,769.42 : x
2. Step 2: Convert to fraction form
   78,577.09/108,438.75 = 42,769.42/x
3. Step 3: Cross multiply
   78,577.09x = 108,438.75 × 42,769.42
4. Step 4: Simplify right side
   78,577.09x = 4,637,862,171.93
5. Step 5: Solve for x
   x = 4,637,862,171.93/78,577.09
6. Step 6: Final answer
   x = 59,023.09