Finding the Fourth Proportional to 939,849.50, 1,296,993.61 and 510,129.72

Step by Step Solution

1. Step 1: Write the proportion equation
   939,849.50 : 1,296,993.61 = 510,129.72 : x
2. Step 2: Convert to fraction form
   939,849.50/1,296,993.61 = 510,129.72/x
3. Step 3: Cross multiply
   939,849.50x = 1,296,993.61 × 510,129.72
4. Step 4: Simplify right side
   939,849.50x = 661,634,987,111.09
5. Step 5: Solve for x
   x = 661,634,987,111.09/939,849.50
6. Step 6: Final answer
   x = 703,979.72