Finding the Fourth Proportional to 19,930.50, 27,505.34 and 10,978.01

Step by Step Solution

1. Step 1: Write the proportion equation
   19,930.50 : 27,505.34 = 10,978.01 : x
2. Step 2: Convert to fraction form
   19,930.50/27,505.34 = 10,978.01/x
3. Step 3: Cross multiply
   19,930.50x = 27,505.34 × 10,978.01
4. Step 4: Simplify right side
   19,930.50x = 301,953,705.16
5. Step 5: Solve for x
   x = 301,953,705.16/19,930.50
6. Step 6: Final answer
   x = 15,150.33