Finding the Fourth Proportional to 122,215.60, 168,654.72 and 71,225.08

Step by Step Solution

1. Step 1: Write the proportion equation
   122,215.60 : 168,654.72 = 71,225.08 : x
2. Step 2: Convert to fraction form
   122,215.60/168,654.72 = 71,225.08/x
3. Step 3: Cross multiply
   122,215.60x = 168,654.72 × 71,225.08
4. Step 4: Simplify right side
   122,215.60x = 12,012,445,924.38
5. Step 5: Solve for x
   x = 12,012,445,924.38/122,215.60
6. Step 6: Final answer
   x = 98,288.97