Finding the Fourth Proportional to 21,117,607.48, 29,142,298.56 and 11,459,815.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,117,607.48 : 29,142,298.56 = 11,459,815.48 : x
2. Step 2: Convert to fraction form
   21,117,607.48/29,142,298.56 = 11,459,815.48/x
3. Step 3: Cross multiply
   21,117,607.48x = 29,142,298.56 × 11,459,815.48
4. Step 4: Simplify right side
   21,117,607.48x = 333,965,364,160,669.69
5. Step 5: Solve for x
   x = 333,965,364,160,669.69/21,117,607.48
6. Step 6: Final answer
   x = 15,814,545.49