Finding the Fourth Proportional to 42,725,796.28, 64,098,775.68 and 13,971,820.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,725,796.28 : 64,098,775.68 = 13,971,820.12 : x
2. Step 2: Convert to fraction form
   42,725,796.28/64,098,775.68 = 13,971,820.12/x
3. Step 3: Cross multiply
   42,725,796.28x = 64,098,775.68 × 13,971,820.12
4. Step 4: Simplify right side
   42,725,796.28x = 895,576,563,713,190.62
5. Step 5: Solve for x
   x = 895,576,563,713,190.62/42,725,796.28
6. Step 6: Final answer
   x = 20,961,026.87