Finding the Fourth Proportional to 196,017.60, 270,565.20 and 155,802.72

Step by Step Solution

1. Step 1: Write the proportion equation
   196,017.60 : 270,565.20 = 155,802.72 : x
2. Step 2: Convert to fraction form
   196,017.60/270,565.20 = 155,802.72/x
3. Step 3: Cross multiply
   196,017.60x = 270,565.20 × 155,802.72
4. Step 4: Simplify right side
   196,017.60x = 42,154,794,097.34
5. Step 5: Solve for x
   x = 42,154,794,097.34/196,017.60
6. Step 6: Final answer
   x = 215,056.17