Finding the Fourth Proportional to 76,212.52, 105,168.20 and 42,218.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,212.52 : 105,168.20 = 42,218.72 : x
2. Step 2: Convert to fraction form
   76,212.52/105,168.20 = 42,218.72/x
3. Step 3: Cross multiply
   76,212.52x = 105,168.20 × 42,218.72
4. Step 4: Simplify right side
   76,212.52x = 4,440,066,788.70
5. Step 5: Solve for x
   x = 4,440,066,788.70/76,212.52
6. Step 6: Final answer
   x = 58,259.02