Finding the Fourth Proportional to 78,647, 108,532.28 and 42,836.90

Step by Step Solution

1. Step 1: Write the proportion equation
   78,647 : 108,532.28 = 42,836.90 : x
2. Step 2: Convert to fraction form
   78,647/108,532.28 = 42,836.90/x
3. Step 3: Cross multiply
   78,647x = 108,532.28 × 42,836.90
4. Step 4: Simplify right side
   78,647x = 4,649,186,425.13
5. Step 5: Solve for x
   x = 4,649,186,425.13/78,647
6. Step 6: Final answer
   x = 59,114.61