Finding the Fourth Proportional to 78,615, 108,490.64 and 42,806.96

Step by Step Solution

1. Step 1: Write the proportion equation
   78,615 : 108,490.64 = 42,806.96 : x
2. Step 2: Convert to fraction form
   78,615/108,490.64 = 42,806.96/x
3. Step 3: Cross multiply
   78,615x = 108,490.64 × 42,806.96
4. Step 4: Simplify right side
   78,615x = 4,644,154,486.85
5. Step 5: Solve for x
   x = 4,644,154,486.85/78,615
6. Step 6: Final answer
   x = 59,074.66