Finding the Fourth Proportional to 42,099.93, 63,104.69 and 20,998.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,099.93 : 63,104.69 = 20,998.28 : x
2. Step 2: Convert to fraction form
   42,099.93/63,104.69 = 20,998.28/x
3. Step 3: Cross multiply
   42,099.93x = 63,104.69 × 20,998.28
4. Step 4: Simplify right side
   42,099.93x = 1,325,090,160.19
5. Step 5: Solve for x
   x = 1,325,090,160.19/42,099.93
6. Step 6: Final answer
   x = 31,474.88