Finding the Fourth Proportional to 103,667.10, 155,664.68 and 78,735.30

Step by Step Solution

1. Step 1: Write the proportion equation
   103,667.10 : 155,664.68 = 78,735.30 : x
2. Step 2: Convert to fraction form
   103,667.10/155,664.68 = 78,735.30/x
3. Step 3: Cross multiply
   103,667.10x = 155,664.68 × 78,735.30
4. Step 4: Simplify right side
   103,667.10x = 12,256,305,279.20
5. Step 5: Solve for x
   x = 12,256,305,279.20/103,667.10
6. Step 6: Final answer
   x = 118,227.53