Finding the Fourth Proportional to 139,606.32, 209,288.52 and 56,446.32

Step by Step Solution

1. Step 1: Write the proportion equation
   139,606.32 : 209,288.52 = 56,446.32 : x
2. Step 2: Convert to fraction form
   139,606.32/209,288.52 = 56,446.32/x
3. Step 3: Cross multiply
   139,606.32x = 209,288.52 × 56,446.32
4. Step 4: Simplify right side
   139,606.32x = 11,813,566,772.25
5. Step 5: Solve for x
   x = 11,813,566,772.25/139,606.32
6. Step 6: Final answer
   x = 84,620.57