Finding the Fourth Proportional to 106,152.62, 146,429.78 and 66,339.50

Step by Step Solution

1. Step 1: Write the proportion equation
   106,152.62 : 146,429.78 = 66,339.50 : x
2. Step 2: Convert to fraction form
   106,152.62/146,429.78 = 66,339.50/x
3. Step 3: Cross multiply
   106,152.62x = 146,429.78 × 66,339.50
4. Step 4: Simplify right side
   106,152.62x = 9,714,078,390.31
5. Step 5: Solve for x
   x = 9,714,078,390.31/106,152.62
6. Step 6: Final answer
   x = 91,510.49