Finding the Fourth Proportional to 105,756.42, 145,953.06 and 58,018.98

Step by Step Solution

1. Step 1: Write the proportion equation
   105,756.42 : 145,953.06 = 58,018.98 : x
2. Step 2: Convert to fraction form
   105,756.42/145,953.06 = 58,018.98/x
3. Step 3: Cross multiply
   105,756.42x = 145,953.06 × 58,018.98
4. Step 4: Simplify right side
   105,756.42x = 8,468,047,669.08
5. Step 5: Solve for x
   x = 8,468,047,669.08/105,756.42
6. Step 6: Final answer
   x = 80,071.24