Finding the Fourth Proportional to 159,781.72, 220,499.98 and 88,164.40

Step by Step Solution

1. Step 1: Write the proportion equation
   159,781.72 : 220,499.98 = 88,164.40 : x
2. Step 2: Convert to fraction form
   159,781.72/220,499.98 = 88,164.40/x
3. Step 3: Cross multiply
   159,781.72x = 220,499.98 × 88,164.40
4. Step 4: Simplify right side
   159,781.72x = 19,440,248,436.71
5. Step 5: Solve for x
   x = 19,440,248,436.71/159,781.72
6. Step 6: Final answer
   x = 121,667.54