Finding the Fourth Proportional to 643,300.50, 887,755.41 and 375,080.34

Step by Step Solution

1. Step 1: Write the proportion equation
   643,300.50 : 887,755.41 = 375,080.34 : x
2. Step 2: Convert to fraction form
   643,300.50/887,755.41 = 375,080.34/x
3. Step 3: Cross multiply
   643,300.50x = 887,755.41 × 375,080.34
4. Step 4: Simplify right side
   643,300.50x = 332,979,601,019.64
5. Step 5: Solve for x
   x = 332,979,601,019.64/643,300.50
6. Step 6: Final answer
   x = 517,611.29