Finding the Fourth Proportional to 61,021.72, 84,210.18 and 34,164.28

Step by Step Solution

1. Step 1: Write the proportion equation
   61,021.72 : 84,210.18 = 34,164.28 : x
2. Step 2: Convert to fraction form
   61,021.72/84,210.18 = 34,164.28/x
3. Step 3: Cross multiply
   61,021.72x = 84,210.18 × 34,164.28
4. Step 4: Simplify right side
   61,021.72x = 2,876,980,168.37
5. Step 5: Solve for x
   x = 2,876,980,168.37/61,021.72
6. Step 6: Final answer
   x = 47,146.82