Finding the Fourth Proportional to 85,364.50, 128,016.69 and 28,422.94

Step by Step Solution

1. Step 1: Write the proportion equation
   85,364.50 : 128,016.69 = 28,422.94 : x
2. Step 2: Convert to fraction form
   85,364.50/128,016.69 = 28,422.94/x
3. Step 3: Cross multiply
   85,364.50x = 128,016.69 × 28,422.94
4. Step 4: Simplify right side
   85,364.50x = 3,638,611,037.31
5. Step 5: Solve for x
   x = 3,638,611,037.31/85,364.50
6. Step 6: Final answer
   x = 42,624.40