Finding the Fourth Proportional to 42,810.04, 64,215.42 and 13,227.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,810.04 : 64,215.42 = 13,227.76 : x
2. Step 2: Convert to fraction form
   42,810.04/64,215.42 = 13,227.76/x
3. Step 3: Cross multiply
   42,810.04x = 64,215.42 × 13,227.76
4. Step 4: Simplify right side
   42,810.04x = 849,426,164.06
5. Step 5: Solve for x
   x = 849,426,164.06/42,810.04
6. Step 6: Final answer
   x = 19,841.75