Finding the Fourth Proportional to 219,128.05, 302,397.01 and 123,643.63

Step by Step Solution

1. Step 1: Write the proportion equation
   219,128.05 : 302,397.01 = 123,643.63 : x
2. Step 2: Convert to fraction form
   219,128.05/302,397.01 = 123,643.63/x
3. Step 3: Cross multiply
   219,128.05x = 302,397.01 × 123,643.63
4. Step 4: Simplify right side
   219,128.05x = 37,389,464,017.55
5. Step 5: Solve for x
   x = 37,389,464,017.55/219,128.05
6. Step 6: Final answer
   x = 170,628.38