Finding the Fourth Proportional to 42,645.69, 63,975.83 and 14,564.21

Step by Step Solution

1. Step 1: Write the proportion equation
   42,645.69 : 63,975.83 = 14,564.21 : x
2. Step 2: Convert to fraction form
   42,645.69/63,975.83 = 14,564.21/x
3. Step 3: Cross multiply
   42,645.69x = 63,975.83 × 14,564.21
4. Step 4: Simplify right side
   42,645.69x = 931,757,030.34
5. Step 5: Solve for x
   x = 931,757,030.34/42,645.69
6. Step 6: Final answer
   x = 21,848.80