Finding the Fourth Proportional to 212,111.88, 318,151.32 and 123,308.70

Step by Step Solution

1. Step 1: Write the proportion equation
   212,111.88 : 318,151.32 = 123,308.70 : x
2. Step 2: Convert to fraction form
   212,111.88/318,151.32 = 123,308.70/x
3. Step 3: Cross multiply
   212,111.88x = 318,151.32 × 123,308.70
4. Step 4: Simplify right side
   212,111.88x = 39,230,825,672.48
5. Step 5: Solve for x
   x = 39,230,825,672.48/212,111.88
6. Step 6: Final answer
   x = 184,953.46