Finding the Fourth Proportional to 78,189.63, 107,901.07 and 42,378.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,189.63 : 107,901.07 = 42,378.72 : x
2. Step 2: Convert to fraction form
   78,189.63/107,901.07 = 42,378.72/x
3. Step 3: Cross multiply
   78,189.63x = 107,901.07 × 42,378.72
4. Step 4: Simplify right side
   78,189.63x = 4,572,709,233.23
5. Step 5: Solve for x
   x = 4,572,709,233.23/78,189.63
6. Step 6: Final answer
   x = 58,482.30