Finding the Fourth Proportional to 85,665.94, 128,483.43 and 23,321.86

Step by Step Solution

1. Step 1: Write the proportion equation
   85,665.94 : 128,483.43 = 23,321.86 : x
2. Step 2: Convert to fraction form
   85,665.94/128,483.43 = 23,321.86/x
3. Step 3: Cross multiply
   85,665.94x = 128,483.43 × 23,321.86
4. Step 4: Simplify right side
   85,665.94x = 2,996,472,566.78
5. Step 5: Solve for x
   x = 2,996,472,566.78/85,665.94
6. Step 6: Final answer
   x = 34,978.58