Finding the Fourth Proportional to 65,155.32, 89,979.84 and 56,152.44

Step by Step Solution

1. Step 1: Write the proportion equation
   65,155.32 : 89,979.84 = 56,152.44 : x
2. Step 2: Convert to fraction form
   65,155.32/89,979.84 = 56,152.44/x
3. Step 3: Cross multiply
   65,155.32x = 89,979.84 × 56,152.44
4. Step 4: Simplify right side
   65,155.32x = 5,052,587,566.81
5. Step 5: Solve for x
   x = 5,052,587,566.81/65,155.32
6. Step 6: Final answer
   x = 77,546.82