Finding the Fourth Proportional to 85,610.58, 128,412.18 and 22,429.31

Step by Step Solution

1. Step 1: Write the proportion equation
   85,610.58 : 128,412.18 = 22,429.31 : x
2. Step 2: Convert to fraction form
   85,610.58/128,412.18 = 22,429.31/x
3. Step 3: Cross multiply
   85,610.58x = 128,412.18 × 22,429.31
4. Step 4: Simplify right side
   85,610.58x = 2,880,196,432.48
5. Step 5: Solve for x
   x = 2,880,196,432.48/85,610.58
6. Step 6: Final answer
   x = 33,643.00