Finding the Fourth Proportional to 21,356,097.88, 29,474,004.72 and 12,064,059.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,356,097.88 : 29,474,004.72 = 12,064,059.76 : x
2. Step 2: Convert to fraction form
   21,356,097.88/29,474,004.72 = 12,064,059.76/x
3. Step 3: Cross multiply
   21,356,097.88x = 29,474,004.72 × 12,064,059.76
4. Step 4: Simplify right side
   21,356,097.88x = 355,576,154,308,602.06
5. Step 5: Solve for x
   x = 355,576,154,308,602.06/21,356,097.88
6. Step 6: Final answer
   x = 16,649,865.36