Finding the Fourth Proportional to 309,700.57, 464,461.61 and 85,068.34

Step by Step Solution

1. Step 1: Write the proportion equation
   309,700.57 : 464,461.61 = 85,068.34 : x
2. Step 2: Convert to fraction form
   309,700.57/464,461.61 = 85,068.34/x
3. Step 3: Cross multiply
   309,700.57x = 464,461.61 × 85,068.34
4. Step 4: Simplify right side
   309,700.57x = 39,510,978,156.43
5. Step 5: Solve for x
   x = 39,510,978,156.43/309,700.57
6. Step 6: Final answer
   x = 127,578.00