Finding the Fourth Proportional to 3,990,520.50, 5,506,918.91 and 2,179,684.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,990,520.50 : 5,506,918.91 = 2,179,684.50 : x
2. Step 2: Convert to fraction form
   3,990,520.50/5,506,918.91 = 2,179,684.50/x
3. Step 3: Cross multiply
   3,990,520.50x = 5,506,918.91 × 2,179,684.50
4. Step 4: Simplify right side
   3,990,520.50x = 12,003,345,779,985.47
5. Step 5: Solve for x
   x = 12,003,345,779,985.47/3,990,520.50
6. Step 6: Final answer
   x = 3,007,964.95