Finding the Fourth Proportional to 89,690.58, 123,726.69 and 57,808.98

Step by Step Solution

1. Step 1: Write the proportion equation
   89,690.58 : 123,726.69 = 57,808.98 : x
2. Step 2: Convert to fraction form
   89,690.58/123,726.69 = 57,808.98/x
3. Step 3: Cross multiply
   89,690.58x = 123,726.69 × 57,808.98
4. Step 4: Simplify right side
   89,690.58x = 7,152,513,747.68
5. Step 5: Solve for x
   x = 7,152,513,747.68/89,690.58
6. Step 6: Final answer
   x = 79,746.54