Finding the Fourth Proportional to 19,856,042.42, 29,784,141.39 and 13,122,959.54

Step by Step Solution

1. Step 1: Write the proportion equation
   19,856,042.42 : 29,784,141.39 = 13,122,959.54 : x
2. Step 2: Convert to fraction form
   19,856,042.42/29,784,141.39 = 13,122,959.54/x
3. Step 3: Cross multiply
   19,856,042.42x = 29,784,141.39 × 13,122,959.54
4. Step 4: Simplify right side
   19,856,042.42x = 390,856,082,394,609.31
5. Step 5: Solve for x
   x = 390,856,082,394,609.31/19,856,042.42
6. Step 6: Final answer
   x = 19,684,490.70