Finding the Fourth Proportional to 12,577.30, 18,865.89 and 7,380.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,577.30 : 18,865.89 = 7,380.34 : x
2. Step 2: Convert to fraction form
   12,577.30/18,865.89 = 7,380.34/x
3. Step 3: Cross multiply
   12,577.30x = 18,865.89 × 7,380.34
4. Step 4: Simplify right side
   12,577.30x = 139,236,682.60
5. Step 5: Solve for x
   x = 139,236,682.60/12,577.30
6. Step 6: Final answer
   x = 11,070.47