Finding the Fourth Proportional to 142,131.30, 212,916.15 and 92,246.10

Step by Step Solution

1. Step 1: Write the proportion equation
   142,131.30 : 212,916.15 = 92,246.10 : x
2. Step 2: Convert to fraction form
   142,131.30/212,916.15 = 92,246.10/x
3. Step 3: Cross multiply
   142,131.30x = 212,916.15 × 92,246.10
4. Step 4: Simplify right side
   142,131.30x = 19,640,684,464.52
5. Step 5: Solve for x
   x = 19,640,684,464.52/142,131.30
6. Step 6: Final answer
   x = 138,186.91