Finding the Fourth Proportional to 170,870.46, 235,802.79 and 99,253.50

Step by Step Solution

1. Step 1: Write the proportion equation
   170,870.46 : 235,802.79 = 99,253.50 : x
2. Step 2: Convert to fraction form
   170,870.46/235,802.79 = 99,253.50/x
3. Step 3: Cross multiply
   170,870.46x = 235,802.79 × 99,253.50
4. Step 4: Simplify right side
   170,870.46x = 23,404,252,217.27
5. Step 5: Solve for x
   x = 23,404,252,217.27/170,870.46
6. Step 6: Final answer
   x = 136,970.73