Finding the Fourth Proportional to 139,633.34, 209,555.24 and 102,288.96

Step by Step Solution

1. Step 1: Write the proportion equation
   139,633.34 : 209,555.24 = 102,288.96 : x
2. Step 2: Convert to fraction form
   139,633.34/209,555.24 = 102,288.96/x
3. Step 3: Cross multiply
   139,633.34x = 209,555.24 × 102,288.96
4. Step 4: Simplify right side
   139,633.34x = 21,435,187,050.71
5. Step 5: Solve for x
   x = 21,435,187,050.71/139,633.34
6. Step 6: Final answer
   x = 153,510.53