Finding the Fourth Proportional to 85,168.89, 127,808.01 and 57,120.63

Step by Step Solution

1. Step 1: Write the proportion equation
   85,168.89 : 127,808.01 = 57,120.63 : x
2. Step 2: Convert to fraction form
   85,168.89/127,808.01 = 57,120.63/x
3. Step 3: Cross multiply
   85,168.89x = 127,808.01 × 57,120.63
4. Step 4: Simplify right side
   85,168.89x = 7,300,474,050.25
5. Step 5: Solve for x
   x = 7,300,474,050.25/85,168.89
6. Step 6: Final answer
   x = 85,717.61