Finding the Fourth Proportional to 165,003.58, 247,086.71 and 138,279.30

Step by Step Solution

1. Step 1: Write the proportion equation
   165,003.58 : 247,086.71 = 138,279.30 : x
2. Step 2: Convert to fraction form
   165,003.58/247,086.71 = 138,279.30/x
3. Step 3: Cross multiply
   165,003.58x = 247,086.71 × 138,279.30
4. Step 4: Simplify right side
   165,003.58x = 34,166,977,298.10
5. Step 5: Solve for x
   x = 34,166,977,298.10/165,003.58
6. Step 6: Final answer
   x = 207,068.10