Finding the Fourth Proportional to 76,210, 105,168.38 and 42,217.74

Step by Step Solution

1. Step 1: Write the proportion equation
   76,210 : 105,168.38 = 42,217.74 : x
2. Step 2: Convert to fraction form
   76,210/105,168.38 = 42,217.74/x
3. Step 3: Cross multiply
   76,210x = 105,168.38 × 42,217.74
4. Step 4: Simplify right side
   76,210x = 4,439,970,902.76
5. Step 5: Solve for x
   x = 4,439,970,902.76/76,210
6. Step 6: Final answer
   x = 58,259.69