Finding the Fourth Proportional to 326,435.16, 450,551.10 and 249,111.72

Step by Step Solution

1. Step 1: Write the proportion equation
   326,435.16 : 450,551.10 = 249,111.72 : x
2. Step 2: Convert to fraction form
   326,435.16/450,551.10 = 249,111.72/x
3. Step 3: Cross multiply
   326,435.16x = 450,551.10 × 249,111.72
4. Step 4: Simplify right side
   326,435.16x = 112,237,559,468.89
5. Step 5: Solve for x
   x = 112,237,559,468.89/326,435.16
6. Step 6: Final answer
   x = 343,828.03