Finding the Fourth Proportional to 42,972.79, 64,462.43 and 27,945.67

Step by Step Solution

1. Step 1: Write the proportion equation
   42,972.79 : 64,462.43 = 27,945.67 : x
2. Step 2: Convert to fraction form
   42,972.79/64,462.43 = 27,945.67/x
3. Step 3: Cross multiply
   42,972.79x = 64,462.43 × 27,945.67
4. Step 4: Simplify right side
   42,972.79x = 1,801,445,656.45
5. Step 5: Solve for x
   x = 1,801,445,656.45/42,972.79
6. Step 6: Final answer
   x = 41,920.61