Finding the Fourth Proportional to 78,339.15, 108,107.69 and 42,528.87

Step by Step Solution

1. Step 1: Write the proportion equation
   78,339.15 : 108,107.69 = 42,528.87 : x
2. Step 2: Convert to fraction form
   78,339.15/108,107.69 = 42,528.87/x
3. Step 3: Cross multiply
   78,339.15x = 108,107.69 × 42,528.87
4. Step 4: Simplify right side
   78,339.15x = 4,597,697,681.37
5. Step 5: Solve for x
   x = 4,597,697,681.37/78,339.15
6. Step 6: Final answer
   x = 58,689.65