Finding the Fourth Proportional to 78,697.56, 108,604.94 and 42,889.87

Step by Step Solution

1. Step 1: Write the proportion equation
   78,697.56 : 108,604.94 = 42,889.87 : x
2. Step 2: Convert to fraction form
   78,697.56/108,604.94 = 42,889.87/x
3. Step 3: Cross multiply
   78,697.56x = 108,604.94 × 42,889.87
4. Step 4: Simplify right side
   78,697.56x = 4,658,051,757.96
5. Step 5: Solve for x
   x = 4,658,051,757.96/78,697.56
6. Step 6: Final answer
   x = 59,189.28