Finding the Fourth Proportional to 208,667.16, 312,995.16 and 58,917.78

Step by Step Solution

1. Step 1: Write the proportion equation
   208,667.16 : 312,995.16 = 58,917.78 : x
2. Step 2: Convert to fraction form
   208,667.16/312,995.16 = 58,917.78/x
3. Step 3: Cross multiply
   208,667.16x = 312,995.16 × 58,917.78
4. Step 4: Simplify right side
   208,667.16x = 18,440,979,977.94
5. Step 5: Solve for x
   x = 18,440,979,977.94/208,667.16
6. Step 6: Final answer
   x = 88,375.09