Finding the Fourth Proportional to 152,772, 210,850.72 and 89,109.80

Step by Step Solution

1. Step 1: Write the proportion equation
   152,772 : 210,850.72 = 89,109.80 : x
2. Step 2: Convert to fraction form
   152,772/210,850.72 = 89,109.80/x
3. Step 3: Cross multiply
   152,772x = 210,850.72 × 89,109.80
4. Step 4: Simplify right side
   152,772x = 18,788,865,489.06
5. Step 5: Solve for x
   x = 18,788,865,489.06/152,772
6. Step 6: Final answer
   x = 122,986.32