Finding the Fourth Proportional to 23,142,318.91, 31,936,231.27 and 12,688,162.81

Step by Step Solution

1. Step 1: Write the proportion equation
   23,142,318.91 : 31,936,231.27 = 12,688,162.81 : x
2. Step 2: Convert to fraction form
   23,142,318.91/31,936,231.27 = 12,688,162.81/x
3. Step 3: Cross multiply
   23,142,318.91x = 31,936,231.27 × 12,688,162.81
4. Step 4: Simplify right side
   23,142,318.91x = 405,212,101,827,592.62
5. Step 5: Solve for x
   x = 405,212,101,827,592.62/23,142,318.91
6. Step 6: Final answer
   x = 17,509,572.12