Finding the Fourth Proportional to 448,300.42, 672,084.16 and 208,563.77

Step by Step Solution

1. Step 1: Write the proportion equation
   448,300.42 : 672,084.16 = 208,563.77 : x
2. Step 2: Convert to fraction form
   448,300.42/672,084.16 = 208,563.77/x
3. Step 3: Cross multiply
   448,300.42x = 672,084.16 × 208,563.77
4. Step 4: Simplify right side
   448,300.42x = 140,172,406,166.88
5. Step 5: Solve for x
   x = 140,172,406,166.88/448,300.42
6. Step 6: Final answer
   x = 312,675.16