Finding the Fourth Proportional to 76,803.52, 105,990.56 and 42,815.52

Step by Step Solution

1. Step 1: Write the proportion equation
   76,803.52 : 105,990.56 = 42,815.52 : x
2. Step 2: Convert to fraction form
   76,803.52/105,990.56 = 42,815.52/x
3. Step 3: Cross multiply
   76,803.52x = 105,990.56 × 42,815.52
4. Step 4: Simplify right side
   76,803.52x = 4,538,040,941.49
5. Step 5: Solve for x
   x = 4,538,040,941.49/76,803.52
6. Step 6: Final answer
   x = 59,086.37