Finding the Fourth Proportional to 21,224,061.84, 29,280,890.70 and 13,061,128.08

Step by Step Solution

1. Step 1: Write the proportion equation
   21,224,061.84 : 29,280,890.70 = 13,061,128.08 : x
2. Step 2: Convert to fraction form
   21,224,061.84/29,280,890.70 = 13,061,128.08/x
3. Step 3: Cross multiply
   21,224,061.84x = 29,280,890.70 × 13,061,128.08
4. Step 4: Simplify right side
   21,224,061.84x = 382,441,463,729,180.88
5. Step 5: Solve for x
   x = 382,441,463,729,180.88/21,224,061.84
6. Step 6: Final answer
   x = 18,019,239.98