Finding the Fourth Proportional to 164,071.60, 245,451.30 and 142,128.70

Step by Step Solution

1. Step 1: Write the proportion equation
   164,071.60 : 245,451.30 = 142,128.70 : x
2. Step 2: Convert to fraction form
   164,071.60/245,451.30 = 142,128.70/x
3. Step 3: Cross multiply
   164,071.60x = 245,451.30 × 142,128.70
4. Step 4: Simplify right side
   164,071.60x = 34,885,674,182.31
5. Step 5: Solve for x
   x = 34,885,674,182.31/164,071.60
6. Step 6: Final answer
   x = 212,624.70