Finding the Fourth Proportional to 38,978.12, 58,470.60 and 10,898.48

Step by Step Solution

1. Step 1: Write the proportion equation
   38,978.12 : 58,470.60 = 10,898.48 : x
2. Step 2: Convert to fraction form
   38,978.12/58,470.60 = 10,898.48/x
3. Step 3: Cross multiply
   38,978.12x = 58,470.60 × 10,898.48
4. Step 4: Simplify right side
   38,978.12x = 637,240,664.69
5. Step 5: Solve for x
   x = 637,240,664.69/38,978.12
6. Step 6: Final answer
   x = 16,348.68