Finding the Fourth Proportional to 64,973.90, 89,464.10 and 55,392.42

Step by Step Solution

1. Step 1: Write the proportion equation
   64,973.90 : 89,464.10 = 55,392.42 : x
2. Step 2: Convert to fraction form
   64,973.90/89,464.10 = 55,392.42/x
3. Step 3: Cross multiply
   64,973.90x = 89,464.10 × 55,392.42
4. Step 4: Simplify right side
   64,973.90x = 4,955,633,002.12
5. Step 5: Solve for x
   x = 4,955,633,002.12/64,973.90
6. Step 6: Final answer
   x = 76,271.13