Finding the Fourth Proportional to 66,064.10, 91,042.58 and 64,849.52

Step by Step Solution

1. Step 1: Write the proportion equation
   66,064.10 : 91,042.58 = 64,849.52 : x
2. Step 2: Convert to fraction form
   66,064.10/91,042.58 = 64,849.52/x
3. Step 3: Cross multiply
   66,064.10x = 91,042.58 × 64,849.52
4. Step 4: Simplify right side
   66,064.10x = 5,904,068,002.29
5. Step 5: Solve for x
   x = 5,904,068,002.29/66,064.10
6. Step 6: Final answer
   x = 89,368.79