Finding the Fourth Proportional to 78,615, 108,487.08 and 42,805.62

Step by Step Solution

1. Step 1: Write the proportion equation
   78,615 : 108,487.08 = 42,805.62 : x
2. Step 2: Convert to fraction form
   78,615/108,487.08 = 42,805.62/x
3. Step 3: Cross multiply
   78,615x = 108,487.08 × 42,805.62
4. Step 4: Simplify right side
   78,615x = 4,643,856,721.39
5. Step 5: Solve for x
   x = 4,643,856,721.39/78,615
6. Step 6: Final answer
   x = 59,070.87