Finding the Fourth Proportional to 72,572.03, 100,131.87 and 42,340.10

Step by Step Solution

1. Step 1: Write the proportion equation
   72,572.03 : 100,131.87 = 42,340.10 : x
2. Step 2: Convert to fraction form
   72,572.03/100,131.87 = 42,340.10/x
3. Step 3: Cross multiply
   72,572.03x = 100,131.87 × 42,340.10
4. Step 4: Simplify right side
   72,572.03x = 4,239,592,888.33
5. Step 5: Solve for x
   x = 4,239,592,888.33/72,572.03
6. Step 6: Final answer
   x = 58,419.11