Finding the Fourth Proportional to 89,554.06, 123,667.59 and 57,777.58

Step by Step Solution

1. Step 1: Write the proportion equation
   89,554.06 : 123,667.59 = 57,777.58 : x
2. Step 2: Convert to fraction form
   89,554.06/123,667.59 = 57,777.58/x
3. Step 3: Cross multiply
   89,554.06x = 123,667.59 × 57,777.58
4. Step 4: Simplify right side
   89,554.06x = 7,145,214,074.63
5. Step 5: Solve for x
   x = 7,145,214,074.63/89,554.06
6. Step 6: Final answer
   x = 79,786.60