Finding the Fourth Proportional to 84,978.10, 127,479.27 and 31,665.53

Step by Step Solution

1. Step 1: Write the proportion equation
   84,978.10 : 127,479.27 = 31,665.53 : x
2. Step 2: Convert to fraction form
   84,978.10/127,479.27 = 31,665.53/x
3. Step 3: Cross multiply
   84,978.10x = 127,479.27 × 31,665.53
4. Step 4: Simplify right side
   84,978.10x = 4,036,698,648.56
5. Step 5: Solve for x
   x = 4,036,698,648.56/84,978.10
6. Step 6: Final answer
   x = 47,502.81