Finding the Fourth Proportional to 78,507.49, 117,667.41 and 28,529.07

Step by Step Solution

1. Step 1: Write the proportion equation
   78,507.49 : 117,667.41 = 28,529.07 : x
2. Step 2: Convert to fraction form
   78,507.49/117,667.41 = 28,529.07/x
3. Step 3: Cross multiply
   78,507.49x = 117,667.41 × 28,529.07
4. Step 4: Simplify right side
   78,507.49x = 3,356,941,776.61
5. Step 5: Solve for x
   x = 3,356,941,776.61/78,507.49
6. Step 6: Final answer
   x = 42,759.51