Finding the Fourth Proportional to 19,978.32, 29,985.88 and 10,124.46

Step by Step Solution

1. Step 1: Write the proportion equation
   19,978.32 : 29,985.88 = 10,124.46 : x
2. Step 2: Convert to fraction form
   19,978.32/29,985.88 = 10,124.46/x
3. Step 3: Cross multiply
   19,978.32x = 29,985.88 × 10,124.46
4. Step 4: Simplify right side
   19,978.32x = 303,590,842.62
5. Step 5: Solve for x
   x = 303,590,842.62/19,978.32
6. Step 6: Final answer
   x = 15,196.01