Finding the Fourth Proportional to 147,972.16, 221,991.42 and 42,799.30

Step by Step Solution

1. Step 1: Write the proportion equation
   147,972.16 : 221,991.42 = 42,799.30 : x
2. Step 2: Convert to fraction form
   147,972.16/221,991.42 = 42,799.30/x
3. Step 3: Cross multiply
   147,972.16x = 221,991.42 × 42,799.30
4. Step 4: Simplify right side
   147,972.16x = 9,501,077,382.01
5. Step 5: Solve for x
   x = 9,501,077,382.01/147,972.16
6. Step 6: Final answer
   x = 64,208.55