Finding the Fourth Proportional to 88,991.82, 122,890.86 and 57,215.52

Step by Step Solution

1. Step 1: Write the proportion equation
   88,991.82 : 122,890.86 = 57,215.52 : x
2. Step 2: Convert to fraction form
   88,991.82/122,890.86 = 57,215.52/x
3. Step 3: Cross multiply
   88,991.82x = 122,890.86 × 57,215.52
4. Step 4: Simplify right side
   88,991.82x = 7,031,264,458.15
5. Step 5: Solve for x
   x = 7,031,264,458.15/88,991.82
6. Step 6: Final answer
   x = 79,010.23