Finding the Fourth Proportional to 98,878.89, 136,453.10 and 53,556.69

Step by Step Solution

1. Step 1: Write the proportion equation
   98,878.89 : 136,453.10 = 53,556.69 : x
2. Step 2: Convert to fraction form
   98,878.89/136,453.10 = 53,556.69/x
3. Step 3: Cross multiply
   98,878.89x = 136,453.10 × 53,556.69
4. Step 4: Simplify right side
   98,878.89x = 7,307,976,108.46
5. Step 5: Solve for x
   x = 7,307,976,108.46/98,878.89
6. Step 6: Final answer
   x = 73,908.36