Finding the Fourth Proportional to 209,026.01, 288,456.72 and 113,534.30

Step by Step Solution

1. Step 1: Write the proportion equation
   209,026.01 : 288,456.72 = 113,534.30 : x
2. Step 2: Convert to fraction form
   209,026.01/288,456.72 = 113,534.30/x
3. Step 3: Cross multiply
   209,026.01x = 288,456.72 × 113,534.30
4. Step 4: Simplify right side
   209,026.01x = 32,749,731,785.50
5. Step 5: Solve for x
   x = 32,749,731,785.50/209,026.01
6. Step 6: Final answer
   x = 156,677.78