Finding the Fourth Proportional to 38,999.50, 58,505.34 and 12,698.05

Step by Step Solution

1. Step 1: Write the proportion equation
   38,999.50 : 58,505.34 = 12,698.05 : x
2. Step 2: Convert to fraction form
   38,999.50/58,505.34 = 12,698.05/x
3. Step 3: Cross multiply
   38,999.50x = 58,505.34 × 12,698.05
4. Step 4: Simplify right side
   38,999.50x = 742,903,732.59
5. Step 5: Solve for x
   x = 742,903,732.59/38,999.50
6. Step 6: Final answer
   x = 19,049.06