Finding the Fourth Proportional to 72,577.49, 100,139.40 and 42,345.56

Step by Step Solution

1. Step 1: Write the proportion equation
   72,577.49 : 100,139.40 = 42,345.56 : x
2. Step 2: Convert to fraction form
   72,577.49/100,139.40 = 42,345.56/x
3. Step 3: Cross multiply
   72,577.49x = 100,139.40 × 42,345.56
4. Step 4: Simplify right side
   72,577.49x = 4,240,458,971.06
5. Step 5: Solve for x
   x = 4,240,458,971.06/72,577.49
6. Step 6: Final answer
   x = 58,426.64