Finding the Fourth Proportional to 42,803.82, 64,211.85 and 13,224.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42,803.82 : 64,211.85 = 13,224.18 : x
2. Step 2: Convert to fraction form
   42,803.82/64,211.85 = 13,224.18/x
3. Step 3: Cross multiply
   42,803.82x = 64,211.85 × 13,224.18
4. Step 4: Simplify right side
   42,803.82x = 849,149,062.53
5. Step 5: Solve for x
   x = 849,149,062.53/42,803.82
6. Step 6: Final answer
   x = 19,838.16