Finding the Fourth Proportional to 76,793.41, 105,970.48 and 42,800.77

Step by Step Solution

1. Step 1: Write the proportion equation
   76,793.41 : 105,970.48 = 42,800.77 : x
2. Step 2: Convert to fraction form
   76,793.41/105,970.48 = 42,800.77/x
3. Step 3: Cross multiply
   76,793.41x = 105,970.48 × 42,800.77
4. Step 4: Simplify right side
   76,793.41x = 4,535,618,141.27
5. Step 5: Solve for x
   x = 4,535,618,141.27/76,793.41
6. Step 6: Final answer
   x = 59,062.60