Finding the Fourth Proportional to 64,642.32, 89,184.96 and 52,685.10

Step by Step Solution

1. Step 1: Write the proportion equation
   64,642.32 : 89,184.96 = 52,685.10 : x
2. Step 2: Convert to fraction form
   64,642.32/89,184.96 = 52,685.10/x
3. Step 3: Cross multiply
   64,642.32x = 89,184.96 × 52,685.10
4. Step 4: Simplify right side
   64,642.32x = 4,698,718,536.10
5. Step 5: Solve for x
   x = 4,698,718,536.10/64,642.32
6. Step 6: Final answer
   x = 72,687.96