Finding the Fourth Proportional to 74,172.42, 102,357.90 and 42,340.68

Step by Step Solution

1. Step 1: Write the proportion equation
   74,172.42 : 102,357.90 = 42,340.68 : x
2. Step 2: Convert to fraction form
   74,172.42/102,357.90 = 42,340.68/x
3. Step 3: Cross multiply
   74,172.42x = 102,357.90 × 42,340.68
4. Step 4: Simplify right side
   74,172.42x = 4,333,903,089.37
5. Step 5: Solve for x
   x = 4,333,903,089.37/74,172.42
6. Step 6: Final answer
   x = 58,430.12