Finding the Fourth Proportional to 42,012, 62,997.60 and 19,806.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,012 : 62,997.60 = 19,806.72 : x
2. Step 2: Convert to fraction form
   42,012/62,997.60 = 19,806.72/x
3. Step 3: Cross multiply
   42,012x = 62,997.60 × 19,806.72
4. Step 4: Simplify right side
   42,012x = 1,247,775,823.87
5. Step 5: Solve for x
   x = 1,247,775,823.87/42,012
6. Step 6: Final answer
   x = 29,700.46