Finding the Fourth Proportional to 33,978.66, 46,897.45 and 19,639.10

Step by Step Solution

1. Step 1: Write the proportion equation
   33,978.66 : 46,897.45 = 19,639.10 : x
2. Step 2: Convert to fraction form
   33,978.66/46,897.45 = 19,639.10/x
3. Step 3: Cross multiply
   33,978.66x = 46,897.45 × 19,639.10
4. Step 4: Simplify right side
   33,978.66x = 921,023,710.30
5. Step 5: Solve for x
   x = 921,023,710.30/33,978.66
6. Step 6: Final answer
   x = 27,105.95