Finding the Fourth Proportional to 71,643.51, 98,842.83 and 42,972.45

Step by Step Solution

1. Step 1: Write the proportion equation
   71,643.51 : 98,842.83 = 42,972.45 : x
2. Step 2: Convert to fraction form
   71,643.51/98,842.83 = 42,972.45/x
3. Step 3: Cross multiply
   71,643.51x = 98,842.83 × 42,972.45
4. Step 4: Simplify right side
   71,643.51x = 4,247,518,075.82
5. Step 5: Solve for x
   x = 4,247,518,075.82/71,643.51
6. Step 6: Final answer
   x = 59,286.85