Finding the Fourth Proportional to 89,642.96, 134,421.56 and 52,213.71

Step by Step Solution

1. Step 1: Write the proportion equation
   89,642.96 : 134,421.56 = 52,213.71 : x
2. Step 2: Convert to fraction form
   89,642.96/134,421.56 = 52,213.71/x
3. Step 3: Cross multiply
   89,642.96x = 134,421.56 × 52,213.71
4. Step 4: Simplify right side
   89,642.96x = 7,018,648,426.57
5. Step 5: Solve for x
   x = 7,018,648,426.57/89,642.96
6. Step 6: Final answer
   x = 78,295.59