Finding the Fourth Proportional to 71,019.61, 106,330.52 and 53,501.74

Step by Step Solution

1. Step 1: Write the proportion equation
   71,019.61 : 106,330.52 = 53,501.74 : x
2. Step 2: Convert to fraction form
   71,019.61/106,330.52 = 53,501.74/x
3. Step 3: Cross multiply
   71,019.61x = 106,330.52 × 53,501.74
4. Step 4: Simplify right side
   71,019.61x = 5,688,867,703.03
5. Step 5: Solve for x
   x = 5,688,867,703.03/71,019.61
6. Step 6: Final answer
   x = 80,102.78