Finding the Fourth Proportional to 60,309.01, 90,315.83 and 42,495.90

Step by Step Solution

1. Step 1: Write the proportion equation
   60,309.01 : 90,315.83 = 42,495.90 : x
2. Step 2: Convert to fraction form
   60,309.01/90,315.83 = 42,495.90/x
3. Step 3: Cross multiply
   60,309.01x = 90,315.83 × 42,495.90
4. Step 4: Simplify right side
   60,309.01x = 3,838,052,480.10
5. Step 5: Solve for x
   x = 3,838,052,480.10/60,309.01
6. Step 6: Final answer
   x = 63,639.79