Finding the Fourth Proportional to 85,470.36, 128,195.82 and 23,145.72

Step by Step Solution

1. Step 1: Write the proportion equation
   85,470.36 : 128,195.82 = 23,145.72 : x
2. Step 2: Convert to fraction form
   85,470.36/128,195.82 = 23,145.72/x
3. Step 3: Cross multiply
   85,470.36x = 128,195.82 × 23,145.72
4. Step 4: Simplify right side
   85,470.36x = 2,967,184,554.89
5. Step 5: Solve for x
   x = 2,967,184,554.89/85,470.36
6. Step 6: Final answer
   x = 34,715.95