Finding the Fourth Proportional to 76,890.36, 106,109.46 and 42,898.56

Step by Step Solution

1. Step 1: Write the proportion equation
   76,890.36 : 106,109.46 = 42,898.56 : x
2. Step 2: Convert to fraction form
   76,890.36/106,109.46 = 42,898.56/x
3. Step 3: Cross multiply
   76,890.36x = 106,109.46 × 42,898.56
4. Step 4: Simplify right side
   76,890.36x = 4,551,943,036.38
5. Step 5: Solve for x
   x = 4,551,943,036.38/76,890.36
6. Step 6: Final answer
   x = 59,200.44