Finding the Fourth Proportional to 13,214,109.05, 19,818,801.31 and 8,407,520.45

Step by Step Solution

1. Step 1: Write the proportion equation
   13,214,109.05 : 19,818,801.31 = 8,407,520.45 : x
2. Step 2: Convert to fraction form
   13,214,109.05/19,818,801.31 = 8,407,520.45/x
3. Step 3: Cross multiply
   13,214,109.05x = 19,818,801.31 × 8,407,520.45
4. Step 4: Simplify right side
   13,214,109.05x = 166,626,977,308,311.75
5. Step 5: Solve for x
   x = 166,626,977,308,311.75/13,214,109.05
6. Step 6: Final answer
   x = 12,609,777.68