Finding the Fourth Proportional to 164,066.10, 245,443.05 and 142,123.20

Step by Step Solution

1. Step 1: Write the proportion equation
   164,066.10 : 245,443.05 = 142,123.20 : x
2. Step 2: Convert to fraction form
   164,066.10/245,443.05 = 142,123.20/x
3. Step 3: Cross multiply
   164,066.10x = 245,443.05 × 142,123.20
4. Step 4: Simplify right side
   164,066.10x = 34,883,151,683.76
5. Step 5: Solve for x
   x = 34,883,151,683.76/164,066.10
6. Step 6: Final answer
   x = 212,616.45