Finding the Fourth Proportional to 64,997.80, 89,646 and 42,343.93

Step by Step Solution

1. Step 1: Write the proportion equation
   64,997.80 : 89,646 = 42,343.93 : x
2. Step 2: Convert to fraction form
   64,997.80/89,646 = 42,343.93/x
3. Step 3: Cross multiply
   64,997.80x = 89,646 × 42,343.93
4. Step 4: Simplify right side
   64,997.80x = 3,795,963,948.78
5. Step 5: Solve for x
   x = 3,795,963,948.78/64,997.80
6. Step 6: Final answer
   x = 58,401.42