Finding the Fourth Proportional to 99,173.56, 136,845.72 and 58,339.52

Step by Step Solution

1. Step 1: Write the proportion equation
   99,173.56 : 136,845.72 = 58,339.52 : x
2. Step 2: Convert to fraction form
   99,173.56/136,845.72 = 58,339.52/x
3. Step 3: Cross multiply
   99,173.56x = 136,845.72 × 58,339.52
4. Step 4: Simplify right side
   99,173.56x = 7,983,513,618.85
5. Step 5: Solve for x
   x = 7,983,513,618.85/99,173.56
6. Step 6: Final answer
   x = 80,500.42