Finding the Fourth Proportional to 112,906.06, 155,810.18 and 65,159.40

Step by Step Solution

1. Step 1: Write the proportion equation
   112,906.06 : 155,810.18 = 65,159.40 : x
2. Step 2: Convert to fraction form
   112,906.06/155,810.18 = 65,159.40/x
3. Step 3: Cross multiply
   112,906.06x = 155,810.18 × 65,159.40
4. Step 4: Simplify right side
   112,906.06x = 10,152,497,842.69
5. Step 5: Solve for x
   x = 10,152,497,842.69/112,906.06
6. Step 6: Final answer
   x = 89,919.87