Finding the Fourth Proportional to 76,799.91, 105,971 and 42,800.95

Step by Step Solution

1. Step 1: Write the proportion equation
   76,799.91 : 105,971 = 42,800.95 : x
2. Step 2: Convert to fraction form
   76,799.91/105,971 = 42,800.95/x
3. Step 3: Cross multiply
   76,799.91x = 105,971 × 42,800.95
4. Step 4: Simplify right side
   76,799.91x = 4,535,659,472.45
5. Step 5: Solve for x
   x = 4,535,659,472.45/76,799.91
6. Step 6: Final answer
   x = 59,058.14