Finding the Fourth Proportional to 64,875.68, 89,468.72 and 40,960.80

Step by Step Solution

1. Step 1: Write the proportion equation
   64,875.68 : 89,468.72 = 40,960.80 : x
2. Step 2: Convert to fraction form
   64,875.68/89,468.72 = 40,960.80/x
3. Step 3: Cross multiply
   64,875.68x = 89,468.72 × 40,960.80
4. Step 4: Simplify right side
   64,875.68x = 3,664,710,346.18
5. Step 5: Solve for x
   x = 3,664,710,346.18/64,875.68
6. Step 6: Final answer
   x = 56,488.20