Finding the Fourth Proportional to 210,417, 290,384.10 and 120,993

Step by Step Solution

1. Step 1: Write the proportion equation
   210,417 : 290,384.10 = 120,993 : x
2. Step 2: Convert to fraction form
   210,417/290,384.10 = 120,993/x
3. Step 3: Cross multiply
   210,417x = 290,384.10 × 120,993
4. Step 4: Simplify right side
   210,417x = 35,134,443,411.30
5. Step 5: Solve for x
   x = 35,134,443,411.30/210,417
6. Step 6: Final answer
   x = 166,975.31