Finding the Fourth Proportional to 42,725,783.28, 64,098,756.18 and 13,971,807.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,725,783.28 : 64,098,756.18 = 13,971,807.12 : x
2. Step 2: Convert to fraction form
   42,725,783.28/64,098,756.18 = 13,971,807.12/x
3. Step 3: Cross multiply
   42,725,783.28x = 64,098,756.18 × 13,971,807.12
4. Step 4: Simplify right side
   42,725,783.28x = 895,575,457,978,868
5. Step 5: Solve for x
   x = 895,575,457,978,868/42,725,783.28
6. Step 6: Final answer
   x = 20,961,007.36