Finding the Fourth Proportional to 152,839.22, 210,870.74 and 89,131.91

Step by Step Solution

1. Step 1: Write the proportion equation
   152,839.22 : 210,870.74 = 89,131.91 : x
2. Step 2: Convert to fraction form
   152,839.22/210,870.74 = 89,131.91/x
3. Step 3: Cross multiply
   152,839.22x = 210,870.74 × 89,131.91
4. Step 4: Simplify right side
   152,839.22x = 18,795,310,987.79
5. Step 5: Solve for x
   x = 18,795,310,987.79/152,839.22
6. Step 6: Final answer
   x = 122,974.40