Finding the Fourth Proportional to 151,385.25, 208,903.35 and 83,388.89

Step by Step Solution

1. Step 1: Write the proportion equation
   151,385.25 : 208,903.35 = 83,388.89 : x
2. Step 2: Convert to fraction form
   151,385.25/208,903.35 = 83,388.89/x
3. Step 3: Cross multiply
   151,385.25x = 208,903.35 × 83,388.89
4. Step 4: Simplify right side
   151,385.25x = 17,420,219,308.75
5. Step 5: Solve for x
   x = 17,420,219,308.75/151,385.25
6. Step 6: Final answer
   x = 115,072.10