Finding the Fourth Proportional to 76,419.50, 105,468.63 and 42,885.50

Step by Step Solution

1. Step 1: Write the proportion equation
   76,419.50 : 105,468.63 = 42,885.50 : x
2. Step 2: Convert to fraction form
   76,419.50/105,468.63 = 42,885.50/x
3. Step 3: Cross multiply
   76,419.50x = 105,468.63 × 42,885.50
4. Step 4: Simplify right side
   76,419.50x = 4,523,074,931.87
5. Step 5: Solve for x
   x = 4,523,074,931.87/76,419.50
6. Step 6: Final answer
   x = 59,187.44