Finding the Fourth Proportional to 643,443.82, 965,173.16 and 194,168.58

Step by Step Solution

1. Step 1: Write the proportion equation
   643,443.82 : 965,173.16 = 194,168.58 : x
2. Step 2: Convert to fraction form
   643,443.82/965,173.16 = 194,168.58/x
3. Step 3: Cross multiply
   643,443.82x = 965,173.16 × 194,168.58
4. Step 4: Simplify right side
   643,443.82x = 187,406,301,931.31
5. Step 5: Solve for x
   x = 187,406,301,931.31/643,443.82
6. Step 6: Final answer
   x = 291,255.11