Finding the Fourth Proportional to 53,783.87, 80,665.17 and 51,116.74

Step by Step Solution

1. Step 1: Write the proportion equation
   53,783.87 : 80,665.17 = 51,116.74 : x
2. Step 2: Convert to fraction form
   53,783.87/80,665.17 = 51,116.74/x
3. Step 3: Cross multiply
   53,783.87x = 80,665.17 × 51,116.74
4. Step 4: Simplify right side
   53,783.87x = 4,123,340,521.95
5. Step 5: Solve for x
   x = 4,123,340,521.95/53,783.87
6. Step 6: Final answer
   x = 76,665.00