Finding the Fourth Proportional to 21,116,997.50, 29,141,456.56 and 11,459,205.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,116,997.50 : 29,141,456.56 = 11,459,205.50 : x
2. Step 2: Convert to fraction form
   21,116,997.50/29,141,456.56 = 11,459,205.50/x
3. Step 3: Cross multiply
   21,116,997.50x = 29,141,456.56 × 11,459,205.50
4. Step 4: Simplify right side
   21,116,997.50x = 333,937,939,290,363.06
5. Step 5: Solve for x
   x = 333,937,939,290,363.06/21,116,997.50
6. Step 6: Final answer
   x = 15,813,703.60