Finding the Fourth Proportional to 71,403.30, 107,002.55 and 52,536.10

Step by Step Solution

1. Step 1: Write the proportion equation
   71,403.30 : 107,002.55 = 52,536.10 : x
2. Step 2: Convert to fraction form
   71,403.30/107,002.55 = 52,536.10/x
3. Step 3: Cross multiply
   71,403.30x = 107,002.55 × 52,536.10
4. Step 4: Simplify right side
   71,403.30x = 5,621,496,667.06
5. Step 5: Solve for x
   x = 5,621,496,667.06/71,403.30
6. Step 6: Final answer
   x = 78,728.81