Finding the Fourth Proportional to 215,667.61, 297,617.31 and 117,551.70

Step by Step Solution

1. Step 1: Write the proportion equation
   215,667.61 : 297,617.31 = 117,551.70 : x
2. Step 2: Convert to fraction form
   215,667.61/297,617.31 = 117,551.70/x
3. Step 3: Cross multiply
   215,667.61x = 297,617.31 × 117,551.70
4. Step 4: Simplify right side
   215,667.61x = 34,985,420,739.93
5. Step 5: Solve for x
   x = 34,985,420,739.93/215,667.61
6. Step 6: Final answer
   x = 162,219.17