Finding the Fourth Proportional to 13,120,067.52, 18,105,719.40 and 7,318,698.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,120,067.52 : 18,105,719.40 = 7,318,698.48 : x
2. Step 2: Convert to fraction form
   13,120,067.52/18,105,719.40 = 7,318,698.48/x
3. Step 3: Cross multiply
   13,120,067.52x = 18,105,719.40 × 7,318,698.48
4. Step 4: Simplify right side
   13,120,067.52x = 132,510,301,052,086.52
5. Step 5: Solve for x
   x = 132,510,301,052,086.52/13,120,067.52
6. Step 6: Final answer
   x = 10,099,818.53