Finding the Fourth Proportional to 89,406.71, 123,389.82 and 51,158.64

Step by Step Solution

1. Step 1: Write the proportion equation
   89,406.71 : 123,389.82 = 51,158.64 : x
2. Step 2: Convert to fraction form
   89,406.71/123,389.82 = 51,158.64/x
3. Step 3: Cross multiply
   89,406.71x = 123,389.82 × 51,158.64
4. Step 4: Simplify right side
   89,406.71x = 6,312,455,381.04
5. Step 5: Solve for x
   x = 6,312,455,381.04/89,406.71
6. Step 6: Final answer
   x = 70,603.83