Finding the Fourth Proportional to 13,119,826.88, 18,105,810.72 and 7,612,785.92

Step by Step Solution

1. Step 1: Write the proportion equation
   13,119,826.88 : 18,105,810.72 = 7,612,785.92 : x
2. Step 2: Convert to fraction form
   13,119,826.88/18,105,810.72 = 7,612,785.92/x
3. Step 3: Cross multiply
   13,119,826.88x = 18,105,810.72 × 7,612,785.92
4. Step 4: Simplify right side
   13,119,826.88x = 137,835,660,919,401.05
5. Step 5: Solve for x
   x = 137,835,660,919,401.05/13,119,826.88
6. Step 6: Final answer
   x = 10,505,905.47