Finding the Fourth Proportional to 109,098.56, 163,607.52 and 85,770.56

Step by Step Solution

1. Step 1: Write the proportion equation
   109,098.56 : 163,607.52 = 85,770.56 : x
2. Step 2: Convert to fraction form
   109,098.56/163,607.52 = 85,770.56/x
3. Step 3: Cross multiply
   109,098.56x = 163,607.52 × 85,770.56
4. Step 4: Simplify right side
   109,098.56x = 14,032,708,610.61
5. Step 5: Solve for x
   x = 14,032,708,610.61/109,098.56
6. Step 6: Final answer
   x = 128,624.14