Finding the Fourth Proportional to 209,852.10, 314,851.05 and 91,608.30

Step by Step Solution

1. Step 1: Write the proportion equation
   209,852.10 : 314,851.05 = 91,608.30 : x
2. Step 2: Convert to fraction form
   209,852.10/314,851.05 = 91,608.30/x
3. Step 3: Cross multiply
   209,852.10x = 314,851.05 × 91,608.30
4. Step 4: Simplify right side
   209,852.10x = 28,842,969,443.72
5. Step 5: Solve for x
   x = 28,842,969,443.72/209,852.10
6. Step 6: Final answer
   x = 137,444.27