Finding the Fourth Proportional to 398,557, 549,981.12 and 224,153.32

Step by Step Solution

1. Step 1: Write the proportion equation
   398,557 : 549,981.12 = 224,153.32 : x
2. Step 2: Convert to fraction form
   398,557/549,981.12 = 224,153.32/x
3. Step 3: Cross multiply
   398,557x = 549,981.12 × 224,153.32
4. Step 4: Simplify right side
   398,557x = 123,280,093,985.32
5. Step 5: Solve for x
   x = 123,280,093,985.32/398,557
6. Step 6: Final answer
   x = 309,316.09