Finding the Fourth Proportional to 57,402, 79,224.48 and 42,372.72

Step by Step Solution

1. Step 1: Write the proportion equation
   57,402 : 79,224.48 = 42,372.72 : x
2. Step 2: Convert to fraction form
   57,402/79,224.48 = 42,372.72/x
3. Step 3: Cross multiply
   57,402x = 79,224.48 × 42,372.72
4. Step 4: Simplify right side
   57,402x = 3,356,956,708.19
5. Step 5: Solve for x
   x = 3,356,956,708.19/57,402
6. Step 6: Final answer
   x = 58,481.53