Finding the Fourth Proportional to 64,566.62, 89,097.32 and 40,378.45

Step by Step Solution

1. Step 1: Write the proportion equation
   64,566.62 : 89,097.32 = 40,378.45 : x
2. Step 2: Convert to fraction form
   64,566.62/89,097.32 = 40,378.45/x
3. Step 3: Cross multiply
   64,566.62x = 89,097.32 × 40,378.45
4. Step 4: Simplify right side
   64,566.62x = 3,597,611,498.89
5. Step 5: Solve for x
   x = 3,597,611,498.89/64,566.62
6. Step 6: Final answer
   x = 55,719.37