Finding the Fourth Proportional to 12,144,103.56, 18,219,144.96 and 8,556,876.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,144,103.56 : 18,219,144.96 = 8,556,876.72 : x
2. Step 2: Convert to fraction form
   12,144,103.56/18,219,144.96 = 8,556,876.72/x
3. Step 3: Cross multiply
   12,144,103.56x = 18,219,144.96 × 8,556,876.72
4. Step 4: Simplify right side
   12,144,103.56x = 155,898,977,366,529.34
5. Step 5: Solve for x
   x = 155,898,977,366,529.34/12,144,103.56
6. Step 6: Final answer
   x = 12,837,421.60