Finding the Fourth Proportional to 85,931.72, 128,897.34 and 23,602.28

Step by Step Solution

1. Step 1: Write the proportion equation
   85,931.72 : 128,897.34 = 23,602.28 : x
2. Step 2: Convert to fraction form
   85,931.72/128,897.34 = 23,602.28/x
3. Step 3: Cross multiply
   85,931.72x = 128,897.34 × 23,602.28
4. Step 4: Simplify right side
   85,931.72x = 3,042,271,109.94
5. Step 5: Solve for x
   x = 3,042,271,109.94/85,931.72
6. Step 6: Final answer
   x = 35,403.35