Finding the Fourth Proportional to 88,570.56, 122,261.49 and 64,885.35

Step by Step Solution

1. Step 1: Write the proportion equation
   88,570.56 : 122,261.49 = 64,885.35 : x
2. Step 2: Convert to fraction form
   88,570.56/122,261.49 = 64,885.35/x
3. Step 3: Cross multiply
   88,570.56x = 122,261.49 × 64,885.35
4. Step 4: Simplify right side
   88,570.56x = 7,932,979,570.17
5. Step 5: Solve for x
   x = 7,932,979,570.17/88,570.56
6. Step 6: Final answer
   x = 89,566.78