Finding the Fourth Proportional to 139,209.77, 192,109.61 and 75,547.57

Step by Step Solution

1. Step 1: Write the proportion equation
   139,209.77 : 192,109.61 = 75,547.57 : x
2. Step 2: Convert to fraction form
   139,209.77/192,109.61 = 75,547.57/x
3. Step 3: Cross multiply
   139,209.77x = 192,109.61 × 75,547.57
4. Step 4: Simplify right side
   139,209.77x = 14,513,414,209.15
5. Step 5: Solve for x
   x = 14,513,414,209.15/139,209.77
6. Step 6: Final answer
   x = 104,255.72