Finding the Fourth Proportional to 209,574.45, 314,309.16 and 89,572.10

Step by Step Solution

1. Step 1: Write the proportion equation
   209,574.45 : 314,309.16 = 89,572.10 : x
2. Step 2: Convert to fraction form
   209,574.45/314,309.16 = 89,572.10/x
3. Step 3: Cross multiply
   209,574.45x = 314,309.16 × 89,572.10
4. Step 4: Simplify right side
   209,574.45x = 28,153,329,938.89
5. Step 5: Solve for x
   x = 28,153,329,938.89/209,574.45
6. Step 6: Final answer
   x = 134,335.70