Finding the Fourth Proportional to 61,255.47, 91,883.17 and 19,139.18

Step by Step Solution

1. Step 1: Write the proportion equation
   61,255.47 : 91,883.17 = 19,139.18 : x
2. Step 2: Convert to fraction form
   61,255.47/91,883.17 = 19,139.18/x
3. Step 3: Cross multiply
   61,255.47x = 91,883.17 × 19,139.18
4. Step 4: Simplify right side
   61,255.47x = 1,758,568,433.90
5. Step 5: Solve for x
   x = 1,758,568,433.90/61,255.47
6. Step 6: Final answer
   x = 28,708.76