Finding the Fourth Proportional to 66,404.53, 91,550.10 and 53,643.34

Step by Step Solution

1. Step 1: Write the proportion equation
   66,404.53 : 91,550.10 = 53,643.34 : x
2. Step 2: Convert to fraction form
   66,404.53/91,550.10 = 53,643.34/x
3. Step 3: Cross multiply
   66,404.53x = 91,550.10 × 53,643.34
4. Step 4: Simplify right side
   66,404.53x = 4,911,053,141.33
5. Step 5: Solve for x
   x = 4,911,053,141.33/66,404.53
6. Step 6: Final answer
   x = 73,956.60