Finding the Fourth Proportional to 76,878.21, 106,081.32 and 42,882.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,878.21 : 106,081.32 = 42,882.72 : x
2. Step 2: Convert to fraction form
   76,878.21/106,081.32 = 42,882.72/x
3. Step 3: Cross multiply
   76,878.21x = 106,081.32 × 42,882.72
4. Step 4: Simplify right side
   76,878.21x = 4,549,055,542.79
5. Step 5: Solve for x
   x = 4,549,055,542.79/76,878.21
6. Step 6: Final answer
   x = 59,172.24