Finding the Fourth Proportional to 78,069.91, 107,736.54 and 42,259.81

Step by Step Solution

1. Step 1: Write the proportion equation
   78,069.91 : 107,736.54 = 42,259.81 : x
2. Step 2: Convert to fraction form
   78,069.91/107,736.54 = 42,259.81/x
3. Step 3: Cross multiply
   78,069.91x = 107,736.54 × 42,259.81
4. Step 4: Simplify right side
   78,069.91x = 4,552,925,710.46
5. Step 5: Solve for x
   x = 4,552,925,710.46/78,069.91
6. Step 6: Final answer
   x = 58,318.57