Finding the Fourth Proportional to 75,871.61, 104,742.17 and 55,430.72

Step by Step Solution

1. Step 1: Write the proportion equation
   75,871.61 : 104,742.17 = 55,430.72 : x
2. Step 2: Convert to fraction form
   75,871.61/104,742.17 = 55,430.72/x
3. Step 3: Cross multiply
   75,871.61x = 104,742.17 × 55,430.72
4. Step 4: Simplify right side
   75,871.61x = 5,805,933,697.25
5. Step 5: Solve for x
   x = 5,805,933,697.25/75,871.61
6. Step 6: Final answer
   x = 76,523.14