Finding the Fourth Proportional to 89,685.68, 134,196.34 and 56,138.44

Step by Step Solution

1. Step 1: Write the proportion equation
   89,685.68 : 134,196.34 = 56,138.44 : x
2. Step 2: Convert to fraction form
   89,685.68/134,196.34 = 56,138.44/x
3. Step 3: Cross multiply
   89,685.68x = 134,196.34 × 56,138.44
4. Step 4: Simplify right side
   89,685.68x = 7,533,573,181.31
5. Step 5: Solve for x
   x = 7,533,573,181.31/89,685.68
6. Step 6: Final answer
   x = 83,999.73