Finding the Fourth Proportional to 42,128.16, 63,146.88 and 22,386.84

Step by Step Solution

1. Step 1: Write the proportion equation
   42,128.16 : 63,146.88 = 22,386.84 : x
2. Step 2: Convert to fraction form
   42,128.16/63,146.88 = 22,386.84/x
3. Step 3: Cross multiply
   42,128.16x = 63,146.88 × 22,386.84
4. Step 4: Simplify right side
   42,128.16x = 1,413,659,099.06
5. Step 5: Solve for x
   x = 1,413,659,099.06/42,128.16
6. Step 6: Final answer
   x = 33,556.16