Finding the Fourth Proportional to 70,504.89, 105,261.87 and 53,775.69

Step by Step Solution

1. Step 1: Write the proportion equation
   70,504.89 : 105,261.87 = 53,775.69 : x
2. Step 2: Convert to fraction form
   70,504.89/105,261.87 = 53,775.69/x
3. Step 3: Cross multiply
   70,504.89x = 105,261.87 × 53,775.69
4. Step 4: Simplify right side
   70,504.89x = 5,660,529,194.38
5. Step 5: Solve for x
   x = 5,660,529,194.38/70,504.89
6. Step 6: Final answer
   x = 80,285.63