Finding the Fourth Proportional to 128,670.89, 192,940.52 and 53,770.59

Step by Step Solution

1. Step 1: Write the proportion equation
   128,670.89 : 192,940.52 = 53,770.59 : x
2. Step 2: Convert to fraction form
   128,670.89/192,940.52 = 53,770.59/x
3. Step 3: Cross multiply
   128,670.89x = 192,940.52 × 53,770.59
4. Step 4: Simplify right side
   128,670.89x = 10,374,525,326.45
5. Step 5: Solve for x
   x = 10,374,525,326.45/128,670.89
6. Step 6: Final answer
   x = 80,628.38