Finding the Fourth Proportional to 1,279,788.48, 1,919,784.72 and 438,347.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279,788.48 : 1,919,784.72 = 438,347.52 : x
2. Step 2: Convert to fraction form
   1,279,788.48/1,919,784.72 = 438,347.52/x
3. Step 3: Cross multiply
   1,279,788.48x = 1,919,784.72 × 438,347.52
4. Step 4: Simplify right side
   1,279,788.48x = 841,532,870,945.89
5. Step 5: Solve for x
   x = 841,532,870,945.89/1,279,788.48
6. Step 6: Final answer
   x = 657,556.22