Finding the Fourth Proportional to 76,422.86, 105,466.84 and 42,431.35

Step by Step Solution

1. Step 1: Write the proportion equation
   76,422.86 : 105,466.84 = 42,431.35 : x
2. Step 2: Convert to fraction form
   76,422.86/105,466.84 = 42,431.35/x
3. Step 3: Cross multiply
   76,422.86x = 105,466.84 × 42,431.35
4. Step 4: Simplify right side
   76,422.86x = 4,475,100,084.73
5. Step 5: Solve for x
   x = 4,475,100,084.73/76,422.86
6. Step 6: Final answer
   x = 58,557.09