Finding the Fourth Proportional to 99,147.60, 136,824.72 and 53,826

Step by Step Solution

1. Step 1: Write the proportion equation
   99,147.60 : 136,824.72 = 53,826 : x
2. Step 2: Convert to fraction form
   99,147.60/136,824.72 = 53,826/x
3. Step 3: Cross multiply
   99,147.60x = 136,824.72 × 53,826
4. Step 4: Simplify right side
   99,147.60x = 7,364,727,378.72
5. Step 5: Solve for x
   x = 7,364,727,378.72/99,147.60
6. Step 6: Final answer
   x = 74,280.44