Finding the Fourth Proportional to 42,221.02, 63,322.05 and 12,635.07

Step by Step Solution

1. Step 1: Write the proportion equation
   42,221.02 : 63,322.05 = 12,635.07 : x
2. Step 2: Convert to fraction form
   42,221.02/63,322.05 = 12,635.07/x
3. Step 3: Cross multiply
   42,221.02x = 63,322.05 × 12,635.07
4. Step 4: Simplify right side
   42,221.02x = 800,078,534.29
5. Step 5: Solve for x
   x = 800,078,534.29/42,221.02
6. Step 6: Final answer
   x = 18,949.77