Finding the Fourth Proportional to 85,434.36, 128,141.82 and 23,100

Step by Step Solution

1. Step 1: Write the proportion equation
   85,434.36 : 128,141.82 = 23,100 : x
2. Step 2: Convert to fraction form
   85,434.36/128,141.82 = 23,100/x
3. Step 3: Cross multiply
   85,434.36x = 128,141.82 × 23,100
4. Step 4: Simplify right side
   85,434.36x = 2,960,076,042
5. Step 5: Solve for x
   x = 2,960,076,042/85,434.36
6. Step 6: Final answer
   x = 34,647.37