Finding the Fourth Proportional to 78,756.37, 108,686.42 and 42,948.34

Step by Step Solution

1. Step 1: Write the proportion equation
   78,756.37 : 108,686.42 = 42,948.34 : x
2. Step 2: Convert to fraction form
   78,756.37/108,686.42 = 42,948.34/x
3. Step 3: Cross multiply
   78,756.37x = 108,686.42 × 42,948.34
4. Step 4: Simplify right side
   78,756.37x = 4,667,901,319.54
5. Step 5: Solve for x
   x = 4,667,901,319.54/78,756.37
6. Step 6: Final answer
   x = 59,270.14