Finding the Fourth Proportional to 208,607.31, 287,878.32 and 113,114.25

Step by Step Solution

1. Step 1: Write the proportion equation
   208,607.31 : 287,878.32 = 113,114.25 : x
2. Step 2: Convert to fraction form
   208,607.31/287,878.32 = 113,114.25/x
3. Step 3: Cross multiply
   208,607.31x = 287,878.32 × 113,114.25
4. Step 4: Simplify right side
   208,607.31x = 32,563,140,258.06
5. Step 5: Solve for x
   x = 32,563,140,258.06/208,607.31
6. Step 6: Final answer
   x = 156,097.79