Finding the Fourth Proportional to 153,635.81, 212,019.29 and 89,119.98

Step by Step Solution

1. Step 1: Write the proportion equation
   153,635.81 : 212,019.29 = 89,119.98 : x
2. Step 2: Convert to fraction form
   153,635.81/212,019.29 = 89,119.98/x
3. Step 3: Cross multiply
   153,635.81x = 212,019.29 × 89,119.98
4. Step 4: Simplify right side
   153,635.81x = 18,895,154,773.01
5. Step 5: Solve for x
   x = 18,895,154,773.01/153,635.81
6. Step 6: Final answer
   x = 122,986.66