Finding the Fourth Proportional to 12,913,380.22, 17,820,921.72 and 8,021,281.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,913,380.22 : 17,820,921.72 = 8,021,281.54 : x
2. Step 2: Convert to fraction form
   12,913,380.22/17,820,921.72 = 8,021,281.54/x
3. Step 3: Cross multiply
   12,913,380.22x = 17,820,921.72 × 8,021,281.54
4. Step 4: Simplify right side
   12,913,380.22x = 142,946,630,418,421.03
5. Step 5: Solve for x
   x = 142,946,630,418,421.03/12,913,380.22
6. Step 6: Final answer
   x = 11,069,652.41