Finding the Fourth Proportional to 136,941.57, 189,010.94 and 89,111.88

Step by Step Solution

1. Step 1: Write the proportion equation
   136,941.57 : 189,010.94 = 89,111.88 : x
2. Step 2: Convert to fraction form
   136,941.57/189,010.94 = 89,111.88/x
3. Step 3: Cross multiply
   136,941.57x = 189,010.94 × 89,111.88
4. Step 4: Simplify right side
   136,941.57x = 16,843,119,758.41
5. Step 5: Solve for x
   x = 16,843,119,758.41/136,941.57
6. Step 6: Final answer
   x = 122,994.94