Finding the Fourth Proportional to 290,111.76, 400,383 and 194,816.88

Step by Step Solution

1. Step 1: Write the proportion equation
   290,111.76 : 400,383 = 194,816.88 : x
2. Step 2: Convert to fraction form
   290,111.76/400,383 = 194,816.88/x
3. Step 3: Cross multiply
   290,111.76x = 400,383 × 194,816.88
4. Step 4: Simplify right side
   290,111.76x = 78,001,366,865.04
5. Step 5: Solve for x
   x = 78,001,366,865.04/290,111.76
6. Step 6: Final answer
   x = 268,866.61