Finding the Fourth Proportional to 89,870.79, 124,025.65 and 51,642.33

Step by Step Solution

1. Step 1: Write the proportion equation
   89,870.79 : 124,025.65 = 51,642.33 : x
2. Step 2: Convert to fraction form
   89,870.79/124,025.65 = 51,642.33/x
3. Step 3: Cross multiply
   89,870.79x = 124,025.65 × 51,642.33
4. Step 4: Simplify right side
   89,870.79x = 6,404,973,416.66
5. Step 5: Solve for x
   x = 6,404,973,416.66/89,870.79
6. Step 6: Final answer
   x = 71,268.69