Finding the Fourth Proportional to 209,301.10, 314,024.55 and 91,057.30

Step by Step Solution

1. Step 1: Write the proportion equation
   209,301.10 : 314,024.55 = 91,057.30 : x
2. Step 2: Convert to fraction form
   209,301.10/314,024.55 = 91,057.30/x
3. Step 3: Cross multiply
   209,301.10x = 314,024.55 × 91,057.30
4. Step 4: Simplify right side
   209,301.10x = 28,594,227,656.72
5. Step 5: Solve for x
   x = 28,594,227,656.72/209,301.10
6. Step 6: Final answer
   x = 136,617.67