Finding the Fourth Proportional to 72,360.20, 99,854.16 and 42,146.48

Step by Step Solution

1. Step 1: Write the proportion equation
   72,360.20 : 99,854.16 = 42,146.48 : x
2. Step 2: Convert to fraction form
   72,360.20/99,854.16 = 42,146.48/x
3. Step 3: Cross multiply
   72,360.20x = 99,854.16 × 42,146.48
4. Step 4: Simplify right side
   72,360.20x = 4,208,501,357.36
5. Step 5: Solve for x
   x = 4,208,501,357.36/72,360.20
6. Step 6: Final answer
   x = 58,160.44