Finding the Fourth Proportional to 208,314.10, 287,491.15 and 117,686.69

Step by Step Solution

1. Step 1: Write the proportion equation
   208,314.10 : 287,491.15 = 117,686.69 : x
2. Step 2: Convert to fraction form
   208,314.10/287,491.15 = 117,686.69/x
3. Step 3: Cross multiply
   208,314.10x = 287,491.15 × 117,686.69
4. Step 4: Simplify right side
   208,314.10x = 33,833,881,847.79
5. Step 5: Solve for x
   x = 33,833,881,847.79/208,314.10
6. Step 6: Final answer
   x = 162,417.63