Finding the Fourth Proportional to 208,112.06, 287,196.71 and 112,620.81

Step by Step Solution

1. Step 1: Write the proportion equation
   208,112.06 : 287,196.71 = 112,620.81 : x
2. Step 2: Convert to fraction form
   208,112.06/287,196.71 = 112,620.81/x
3. Step 3: Cross multiply
   208,112.06x = 287,196.71 × 112,620.81
4. Step 4: Simplify right side
   208,112.06x = 32,344,326,623.42
5. Step 5: Solve for x
   x = 32,344,326,623.42/208,112.06
6. Step 6: Final answer
   x = 155,417.84