Finding the Fourth Proportional to 249,111.45, 373,721.85 and 80,603.10

Step by Step Solution

1. Step 1: Write the proportion equation
   249,111.45 : 373,721.85 = 80,603.10 : x
2. Step 2: Convert to fraction form
   249,111.45/373,721.85 = 80,603.10/x
3. Step 3: Cross multiply
   249,111.45x = 373,721.85 × 80,603.10
4. Step 4: Simplify right side
   249,111.45x = 30,123,139,647.74
5. Step 5: Solve for x
   x = 30,123,139,647.74/249,111.45
6. Step 6: Final answer
   x = 120,922.34