Finding the Fourth Proportional to 43,316.06, 64,389.59 and 42,039.05

Step by Step Solution

1. Step 1: Write the proportion equation
   43,316.06 : 64,389.59 = 42,039.05 : x
2. Step 2: Convert to fraction form
   43,316.06/64,389.59 = 42,039.05/x
3. Step 3: Cross multiply
   43,316.06x = 64,389.59 × 42,039.05
4. Step 4: Simplify right side
   43,316.06x = 2,706,876,661.35
5. Step 5: Solve for x
   x = 2,706,876,661.35/43,316.06
6. Step 6: Final answer
   x = 62,491.30