Finding the Fourth Proportional to 76,230, 105,197.40 and 42,696.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,230 : 105,197.40 = 42,696.72 : x
2. Step 2: Convert to fraction form
   76,230/105,197.40 = 42,696.72/x
3. Step 3: Cross multiply
   76,230x = 105,197.40 × 42,696.72
4. Step 4: Simplify right side
   76,230x = 4,491,583,932.53
5. Step 5: Solve for x
   x = 4,491,583,932.53/76,230
6. Step 6: Final answer
   x = 58,921.47