Finding the Fourth Proportional to 2,173,731.51, 2,999,610.72 and 1,206,861.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,173,731.51 : 2,999,610.72 = 1,206,861.57 : x
2. Step 2: Convert to fraction form
   2,173,731.51/2,999,610.72 = 1,206,861.57/x
3. Step 3: Cross multiply
   2,173,731.51x = 2,999,610.72 × 1,206,861.57
4. Step 4: Simplify right side
   2,173,731.51x = 3,620,114,902,928.03
5. Step 5: Solve for x
   x = 3,620,114,902,928.03/2,173,731.51
6. Step 6: Final answer
   x = 1,665,391.92