Finding the Fourth Proportional to 42,108,890.99, 63,169,361.73 and 12,965,195.85

Step by Step Solution

1. Step 1: Write the proportion equation
   42,108,890.99 : 63,169,361.73 = 12,965,195.85 : x
2. Step 2: Convert to fraction form
   42,108,890.99/63,169,361.73 = 12,965,195.85/x
3. Step 3: Cross multiply
   42,108,890.99x = 63,169,361.73 × 12,965,195.85
4. Step 4: Simplify right side
   42,108,890.99x = 819,003,146,548,944.75
5. Step 5: Solve for x
   x = 819,003,146,548,944.75/42,108,890.99
6. Step 6: Final answer
   x = 19,449,648.93