Finding the Fourth Proportional to 205,002.72, 307,478.64 and 55,254.72

Step by Step Solution

1. Step 1: Write the proportion equation
   205,002.72 : 307,478.64 = 55,254.72 : x
2. Step 2: Convert to fraction form
   205,002.72/307,478.64 = 55,254.72/x
3. Step 3: Cross multiply
   205,002.72x = 307,478.64 × 55,254.72
4. Step 4: Simplify right side
   205,002.72x = 16,989,646,159.18
5. Step 5: Solve for x
   x = 16,989,646,159.18/205,002.72
6. Step 6: Final answer
   x = 82,875.22