Finding the Fourth Proportional to 219,123.29, 302,384.00 and 123,638.87

Step by Step Solution

1. Step 1: Write the proportion equation
   219,123.29 : 302,384.00 = 123,638.87 : x
2. Step 2: Convert to fraction form
   219,123.29/302,384.00 = 123,638.87/x
3. Step 3: Cross multiply
   219,123.29x = 302,384.00 × 123,638.87
4. Step 4: Simplify right side
   219,123.29x = 37,386,413,935.97
5. Step 5: Solve for x
   x = 37,386,413,935.97/219,123.29
6. Step 6: Final answer
   x = 170,618.17