Finding the Fourth Proportional to 213,080.10, 319,328.55 and 141,800.10

Step by Step Solution

1. Step 1: Write the proportion equation
   213,080.10 : 319,328.55 = 141,800.10 : x
2. Step 2: Convert to fraction form
   213,080.10/319,328.55 = 141,800.10/x
3. Step 3: Cross multiply
   213,080.10x = 319,328.55 × 141,800.10
4. Step 4: Simplify right side
   213,080.10x = 45,280,820,322.86
5. Step 5: Solve for x
   x = 45,280,820,322.86/213,080.10
6. Step 6: Final answer
   x = 212,506.10