Finding the Fourth Proportional to 98,878.72, 136,452.72 and 54,166.72

Step by Step Solution

1. Step 1: Write the proportion equation
   98,878.72 : 136,452.72 = 54,166.72 : x
2. Step 2: Convert to fraction form
   98,878.72/136,452.72 = 54,166.72/x
3. Step 3: Cross multiply
   98,878.72x = 136,452.72 × 54,166.72
4. Step 4: Simplify right side
   98,878.72x = 7,391,196,277.48
5. Step 5: Solve for x
   x = 7,391,196,277.48/98,878.72
6. Step 6: Final answer
   x = 74,750.12