Finding the Fourth Proportional to 46,429.92, 69,623.94 and 13,142.07

Step by Step Solution

1. Step 1: Write the proportion equation
   46,429.92 : 69,623.94 = 13,142.07 : x
2. Step 2: Convert to fraction form
   46,429.92/69,623.94 = 13,142.07/x
3. Step 3: Cross multiply
   46,429.92x = 69,623.94 × 13,142.07
4. Step 4: Simplify right side
   46,429.92x = 915,002,693.16
5. Step 5: Solve for x
   x = 915,002,693.16/46,429.92
6. Step 6: Final answer
   x = 19,707.18