Finding the Fourth Proportional to 215,158.90, 296,919.30 and 118,364.12

Step by Step Solution

1. Step 1: Write the proportion equation
   215,158.90 : 296,919.30 = 118,364.12 : x
2. Step 2: Convert to fraction form
   215,158.90/296,919.30 = 118,364.12/x
3. Step 3: Cross multiply
   215,158.90x = 296,919.30 × 118,364.12
4. Step 4: Simplify right side
   215,158.90x = 35,144,591,655.52
5. Step 5: Solve for x
   x = 35,144,591,655.52/215,158.90
6. Step 6: Final answer
   x = 163,342.50