Finding the Fourth Proportional to 142,100.30, 212,869.65 and 92,215.10

Step by Step Solution

1. Step 1: Write the proportion equation
   142,100.30 : 212,869.65 = 92,215.10 : x
2. Step 2: Convert to fraction form
   142,100.30/212,869.65 = 92,215.10/x
3. Step 3: Cross multiply
   142,100.30x = 212,869.65 × 92,215.10
4. Step 4: Simplify right side
   142,100.30x = 19,629,796,061.72
5. Step 5: Solve for x
   x = 19,629,796,061.72/142,100.30
6. Step 6: Final answer
   x = 138,140.43