Finding the Fourth Proportional to 85,005.99, 127,403.89 and 42,898.12

Step by Step Solution

1. Step 1: Write the proportion equation
   85,005.99 : 127,403.89 = 42,898.12 : x
2. Step 2: Convert to fraction form
   85,005.99/127,403.89 = 42,898.12/x
3. Step 3: Cross multiply
   85,005.99x = 127,403.89 × 42,898.12
4. Step 4: Simplify right side
   85,005.99x = 5,465,387,833.56
5. Step 5: Solve for x
   x = 5,465,387,833.56/85,005.99
6. Step 6: Final answer
   x = 64,294.15