Finding the Fourth Proportional to 1,218,139.35, 1,830,521.34 and 649,921.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218,139.35 : 1,830,521.34 = 649,921.89 : x
2. Step 2: Convert to fraction form
   1,218,139.35/1,830,521.34 = 649,921.89/x
3. Step 3: Cross multiply
   1,218,139.35x = 1,830,521.34 × 649,921.89
4. Step 4: Simplify right side
   1,218,139.35x = 1,189,695,888,978.13
5. Step 5: Solve for x
   x = 1,189,695,888,978.13/1,218,139.35
6. Step 6: Final answer
   x = 976,650.08