Finding the Fourth Proportional to 112,411.68, 155,159.40 and 64,680.41

Step by Step Solution

1. Step 1: Write the proportion equation
   112,411.68 : 155,159.40 = 64,680.41 : x
2. Step 2: Convert to fraction form
   112,411.68/155,159.40 = 64,680.41/x
3. Step 3: Cross multiply
   112,411.68x = 155,159.40 × 64,680.41
4. Step 4: Simplify right side
   112,411.68x = 10,035,772,831.56
5. Step 5: Solve for x
   x = 10,035,772,831.56/112,411.68
6. Step 6: Final answer
   x = 89,276.96