Finding the Fourth Proportional to 19,470.30, 29,196.81 and 7,780.38

Step by Step Solution

1. Step 1: Write the proportion equation
   19,470.30 : 29,196.81 = 7,780.38 : x
2. Step 2: Convert to fraction form
   19,470.30/29,196.81 = 7,780.38/x
3. Step 3: Cross multiply
   19,470.30x = 29,196.81 × 7,780.38
4. Step 4: Simplify right side
   19,470.30x = 227,162,276.59
5. Step 5: Solve for x
   x = 227,162,276.59/19,470.30
6. Step 6: Final answer
   x = 11,667.12