Finding the Fourth Proportional to 99,146.72, 136,822.72 and 53,824.78

Step by Step Solution

1. Step 1: Write the proportion equation
   99,146.72 : 136,822.72 = 53,824.78 : x
2. Step 2: Convert to fraction form
   99,146.72/136,822.72 = 53,824.78/x
3. Step 3: Cross multiply
   99,146.72x = 136,822.72 × 53,824.78
4. Step 4: Simplify right side
   99,146.72x = 7,364,452,803.00
5. Step 5: Solve for x
   x = 7,364,452,803.00/99,146.72
6. Step 6: Final answer
   x = 74,278.33