Finding the Fourth Proportional to 12,763,533.91, 19,145,467.59 and 4,243,870.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,763,533.91 : 19,145,467.59 = 4,243,870.21 : x
2. Step 2: Convert to fraction form
   12,763,533.91/19,145,467.59 = 4,243,870.21/x
3. Step 3: Cross multiply
   12,763,533.91x = 19,145,467.59 × 4,243,870.21
4. Step 4: Simplify right side
   12,763,533.91x = 81,250,879,561,721.50
5. Step 5: Solve for x
   x = 81,250,879,561,721.50/12,763,533.91
6. Step 6: Final answer
   x = 6,365,860.75