Finding the Fourth Proportional to 76,806.60, 105,993.63 and 42,817.25

Step by Step Solution

1. Step 1: Write the proportion equation
   76,806.60 : 105,993.63 = 42,817.25 : x
2. Step 2: Convert to fraction form
   76,806.60/105,993.63 = 42,817.25/x
3. Step 3: Cross multiply
   76,806.60x = 105,993.63 × 42,817.25
4. Step 4: Simplify right side
   76,806.60x = 4,538,355,224.15
5. Step 5: Solve for x
   x = 4,538,355,224.15/76,806.60
6. Step 6: Final answer
   x = 59,088.09