Finding the Fourth Proportional to 939,848.50, 1,296,992.23 and 510,128.72

Step by Step Solution

1. Step 1: Write the proportion equation
   939,848.50 : 1,296,992.23 = 510,128.72 : x
2. Step 2: Convert to fraction form
   939,848.50/1,296,992.23 = 510,128.72/x
3. Step 3: Cross multiply
   939,848.50x = 1,296,992.23 × 510,128.72
4. Step 4: Simplify right side
   939,848.50x = 661,632,979,654.89
5. Step 5: Solve for x
   x = 661,632,979,654.89/939,848.50
6. Step 6: Final answer
   x = 703,978.34