Finding the Fourth Proportional to 72,435.75, 99,961.70 and 42,242.01

Step by Step Solution

1. Step 1: Write the proportion equation
   72,435.75 : 99,961.70 = 42,242.01 : x
2. Step 2: Convert to fraction form
   72,435.75/99,961.70 = 42,242.01/x
3. Step 3: Cross multiply
   72,435.75x = 99,961.70 × 42,242.01
4. Step 4: Simplify right side
   72,435.75x = 4,222,582,919.81
5. Step 5: Solve for x
   x = 4,222,582,919.81/72,435.75
6. Step 6: Final answer
   x = 58,294.18