Finding the Fourth Proportional to 83,388.68, 115,074.15 and 47,578.04

Step by Step Solution

1. Step 1: Write the proportion equation
   83,388.68 : 115,074.15 = 47,578.04 : x
2. Step 2: Convert to fraction form
   83,388.68/115,074.15 = 47,578.04/x
3. Step 3: Cross multiply
   83,388.68x = 115,074.15 × 47,578.04
4. Step 4: Simplify right side
   83,388.68x = 5,475,002,511.67
5. Step 5: Solve for x
   x = 5,475,002,511.67/83,388.68
6. Step 6: Final answer
   x = 65,656.42