Finding the Fourth Proportional to 58,039.51, 86,947.15 and 42,815.23

Step by Step Solution

1. Step 1: Write the proportion equation
   58,039.51 : 86,947.15 = 42,815.23 : x
2. Step 2: Convert to fraction form
   58,039.51/86,947.15 = 42,815.23/x
3. Step 3: Cross multiply
   58,039.51x = 86,947.15 × 42,815.23
4. Step 4: Simplify right side
   58,039.51x = 3,722,662,225.09
5. Step 5: Solve for x
   x = 3,722,662,225.09/58,039.51
6. Step 6: Final answer
   x = 64,140.14