Finding the Fourth Proportional to 112,569.96, 155,259.98 and 78,567.60

Step by Step Solution

1. Step 1: Write the proportion equation
   112,569.96 : 155,259.98 = 78,567.60 : x
2. Step 2: Convert to fraction form
   112,569.96/155,259.98 = 78,567.60/x
3. Step 3: Cross multiply
   112,569.96x = 155,259.98 × 78,567.60
4. Step 4: Simplify right side
   112,569.96x = 12,198,404,004.65
5. Step 5: Solve for x
   x = 12,198,404,004.65/112,569.96
6. Step 6: Final answer
   x = 108,362.87