Finding the Fourth Proportional to 73,185.48, 109,785.54 and 19,878.30

Step by Step Solution

1. Step 1: Write the proportion equation
   73,185.48 : 109,785.54 = 19,878.30 : x
2. Step 2: Convert to fraction form
   73,185.48/109,785.54 = 19,878.30/x
3. Step 3: Cross multiply
   73,185.48x = 109,785.54 × 19,878.30
4. Step 4: Simplify right side
   73,185.48x = 2,182,349,899.78
5. Step 5: Solve for x
   x = 2,182,349,899.78/73,185.48
6. Step 6: Final answer
   x = 29,819.44