Finding the Fourth Proportional to 78,051.29, 107,709.99 and 42,240.51

Step by Step Solution

1. Step 1: Write the proportion equation
   78,051.29 : 107,709.99 = 42,240.51 : x
2. Step 2: Convert to fraction form
   78,051.29/107,709.99 = 42,240.51/x
3. Step 3: Cross multiply
   78,051.29x = 107,709.99 × 42,240.51
4. Step 4: Simplify right side
   78,051.29x = 4,549,724,909.69
5. Step 5: Solve for x
   x = 4,549,724,909.69/78,051.29
6. Step 6: Final answer
   x = 58,291.48