Finding the Fourth Proportional to 915,345.84, 1,373,109.75 and 339,123.27

Step by Step Solution

1. Step 1: Write the proportion equation
   915,345.84 : 1,373,109.75 = 339,123.27 : x
2. Step 2: Convert to fraction form
   915,345.84/1,373,109.75 = 339,123.27/x
3. Step 3: Cross multiply
   915,345.84x = 1,373,109.75 × 339,123.27
4. Step 4: Simplify right side
   915,345.84x = 465,653,468,488.88
5. Step 5: Solve for x
   x = 465,653,468,488.88/915,345.84
6. Step 6: Final answer
   x = 508,718.62