Finding the Fourth Proportional to 112,817.52, 155,605.38 and 81,019.08

Step by Step Solution

1. Step 1: Write the proportion equation
   112,817.52 : 155,605.38 = 81,019.08 : x
2. Step 2: Convert to fraction form
   112,817.52/155,605.38 = 81,019.08/x
3. Step 3: Cross multiply
   112,817.52x = 155,605.38 × 81,019.08
4. Step 4: Simplify right side
   112,817.52x = 12,607,004,730.65
5. Step 5: Solve for x
   x = 12,607,004,730.65/112,817.52
6. Step 6: Final answer
   x = 111,746.87