Finding the Fourth Proportional to 105,439.61, 158,159.61 and 26,553.30

Step by Step Solution

1. Step 1: Write the proportion equation
   105,439.61 : 158,159.61 = 26,553.30 : x
2. Step 2: Convert to fraction form
   105,439.61/158,159.61 = 26,553.30/x
3. Step 3: Cross multiply
   105,439.61x = 158,159.61 × 26,553.30
4. Step 4: Simplify right side
   105,439.61x = 4,199,659,572.21
5. Step 5: Solve for x
   x = 4,199,659,572.21/105,439.61
6. Step 6: Final answer
   x = 39,830.00