Finding the Fourth Proportional to 105,343.98, 145,374.75 and 57,597.72

Step by Step Solution

1. Step 1: Write the proportion equation
   105,343.98 : 145,374.75 = 57,597.72 : x
2. Step 2: Convert to fraction form
   105,343.98/145,374.75 = 57,597.72/x
3. Step 3: Cross multiply
   105,343.98x = 145,374.75 × 57,597.72
4. Step 4: Simplify right side
   105,343.98x = 8,373,254,145.57
5. Step 5: Solve for x
   x = 8,373,254,145.57/105,343.98
6. Step 6: Final answer
   x = 79,484.89