Finding the Fourth Proportional to 21,042,004.73, 29,042,807.72 and 12,342,979.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,042,004.73 : 29,042,807.72 = 12,342,979.86 : x
2. Step 2: Convert to fraction form
   21,042,004.73/29,042,807.72 = 12,342,979.86/x
3. Step 3: Cross multiply
   21,042,004.73x = 29,042,807.72 × 12,342,979.86
4. Step 4: Simplify right side
   21,042,004.73x = 358,474,790,704,097.62
5. Step 5: Solve for x
   x = 358,474,790,704,097.62/21,042,004.73
6. Step 6: Final answer
   x = 17,036,151.99