Finding the Fourth Proportional to 78,632.62, 108,509.55 and 42,820.49

Step by Step Solution

1. Step 1: Write the proportion equation
   78,632.62 : 108,509.55 = 42,820.49 : x
2. Step 2: Convert to fraction form
   78,632.62/108,509.55 = 42,820.49/x
3. Step 3: Cross multiply
   78,632.62x = 108,509.55 × 42,820.49
4. Step 4: Simplify right side
   78,632.62x = 4,646,432,100.68
5. Step 5: Solve for x
   x = 4,646,432,100.68/78,632.62
6. Step 6: Final answer
   x = 59,090.39