Finding the Fourth Proportional to 309,620.10, 464,867.55 and 191,522.10

Step by Step Solution

1. Step 1: Write the proportion equation
   309,620.10 : 464,867.55 = 191,522.10 : x
2. Step 2: Convert to fraction form
   309,620.10/464,867.55 = 191,522.10/x
3. Step 3: Cross multiply
   309,620.10x = 464,867.55 × 191,522.10
4. Step 4: Simplify right side
   309,620.10x = 89,032,409,397.86
5. Step 5: Solve for x
   x = 89,032,409,397.86/309,620.10
6. Step 6: Final answer
   x = 287,553.71