Finding the Fourth Proportional to 111,767.57, 154,240.28 and 60,780.79

Step by Step Solution

1. Step 1: Write the proportion equation
   111,767.57 : 154,240.28 = 60,780.79 : x
2. Step 2: Convert to fraction form
   111,767.57/154,240.28 = 60,780.79/x
3. Step 3: Cross multiply
   111,767.57x = 154,240.28 × 60,780.79
4. Step 4: Simplify right side
   111,767.57x = 9,374,845,834.57
5. Step 5: Solve for x
   x = 9,374,845,834.57/111,767.57
6. Step 6: Final answer
   x = 83,878.05