Finding the Fourth Proportional to 85,127.10, 127,711.53 and 42,903.42

Step by Step Solution

1. Step 1: Write the proportion equation
   85,127.10 : 127,711.53 = 42,903.42 : x
2. Step 2: Convert to fraction form
   85,127.10/127,711.53 = 42,903.42/x
3. Step 3: Cross multiply
   85,127.10x = 127,711.53 × 42,903.42
4. Step 4: Simplify right side
   85,127.10x = 5,479,261,410.43
5. Step 5: Solve for x
   x = 5,479,261,410.43/85,127.10
6. Step 6: Final answer
   x = 64,365.65