Finding the Fourth Proportional to 1,155,308.78, 1,733,373.57 and 515,554.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155,308.78 : 1,733,373.57 = 515,554.31 : x
2. Step 2: Convert to fraction form
   1,155,308.78/1,733,373.57 = 515,554.31/x
3. Step 3: Cross multiply
   1,155,308.78x = 1,733,373.57 × 515,554.31
4. Step 4: Simplify right side
   1,155,308.78x = 893,648,214,853.59
5. Step 5: Solve for x
   x = 893,648,214,853.59/1,155,308.78
6. Step 6: Final answer
   x = 773,514.61