Finding the Fourth Proportional to 8,977.82, 12,389.40 and 5,201.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,977.82 : 12,389.40 = 5,201.72 : x
2. Step 2: Convert to fraction form
   8,977.82/12,389.40 = 5,201.72/x
3. Step 3: Cross multiply
   8,977.82x = 12,389.40 × 5,201.72
4. Step 4: Simplify right side
   8,977.82x = 64,446,189.77
5. Step 5: Solve for x
   x = 64,446,189.77/8,977.82
6. Step 6: Final answer
   x = 7,178.38