Finding the Fourth Proportional to 78,036.48, 107,689.91 and 42,225.71

Step by Step Solution

1. Step 1: Write the proportion equation
   78,036.48 : 107,689.91 = 42,225.71 : x
2. Step 2: Convert to fraction form
   78,036.48/107,689.91 = 42,225.71/x
3. Step 3: Cross multiply
   78,036.48x = 107,689.91 × 42,225.71
4. Step 4: Simplify right side
   78,036.48x = 4,547,282,160.01
5. Step 5: Solve for x
   x = 4,547,282,160.01/78,036.48
6. Step 6: Final answer
   x = 58,271.24