Finding the Fourth Proportional to 89,570.88, 134,152.08 and 42,856.80

Step by Step Solution

1. Step 1: Write the proportion equation
   89,570.88 : 134,152.08 = 42,856.80 : x
2. Step 2: Convert to fraction form
   89,570.88/134,152.08 = 42,856.80/x
3. Step 3: Cross multiply
   89,570.88x = 134,152.08 × 42,856.80
4. Step 4: Simplify right side
   89,570.88x = 5,749,328,862.14
5. Step 5: Solve for x
   x = 5,749,328,862.14/89,570.88
6. Step 6: Final answer
   x = 64,187.48