Finding the Fourth Proportional to 215,004.17, 322,498.94 and 55,081.55

Step by Step Solution

1. Step 1: Write the proportion equation
   215,004.17 : 322,498.94 = 55,081.55 : x
2. Step 2: Convert to fraction form
   215,004.17/322,498.94 = 55,081.55/x
3. Step 3: Cross multiply
   215,004.17x = 322,498.94 × 55,081.55
4. Step 4: Simplify right side
   215,004.17x = 17,763,742,019.40
5. Step 5: Solve for x
   x = 17,763,742,019.40/215,004.17
6. Step 6: Final answer
   x = 82,620.45