Finding the Fourth Proportional to 65,091.32, 89,891.52 and 56,088.44

Step by Step Solution

1. Step 1: Write the proportion equation
   65,091.32 : 89,891.52 = 56,088.44 : x
2. Step 2: Convert to fraction form
   65,091.32/89,891.52 = 56,088.44/x
3. Step 3: Cross multiply
   65,091.32x = 89,891.52 × 56,088.44
4. Step 4: Simplify right side
   65,091.32x = 5,041,875,126.03
5. Step 5: Solve for x
   x = 5,041,875,126.03/65,091.32
6. Step 6: Final answer
   x = 77,458.49