Finding the Fourth Proportional to 89,431.89, 123,364.62 and 55,839.57

Step by Step Solution

1. Step 1: Write the proportion equation
   89,431.89 : 123,364.62 = 55,839.57 : x
2. Step 2: Convert to fraction form
   89,431.89/123,364.62 = 55,839.57/x
3. Step 3: Cross multiply
   89,431.89x = 123,364.62 × 55,839.57
4. Step 4: Simplify right side
   89,431.89x = 6,888,627,054.82
5. Step 5: Solve for x
   x = 6,888,627,054.82/89,431.89
6. Step 6: Final answer
   x = 77,026.52