Finding the Fourth Proportional to 59,491.60, 89,064.60 and 57,763.60

Step by Step Solution

1. Step 1: Write the proportion equation
   59,491.60 : 89,064.60 = 57,763.60 : x
2. Step 2: Convert to fraction form
   59,491.60/89,064.60 = 57,763.60/x
3. Step 3: Cross multiply
   59,491.60x = 89,064.60 × 57,763.60
4. Step 4: Simplify right side
   59,491.60x = 5,144,691,928.56
5. Step 5: Solve for x
   x = 5,144,691,928.56/59,491.60
6. Step 6: Final answer
   x = 86,477.62