Finding the Fourth Proportional to 77,071.72, 115,616.84 and 27,141.50

Step by Step Solution

1. Step 1: Write the proportion equation
   77,071.72 : 115,616.84 = 27,141.50 : x
2. Step 2: Convert to fraction form
   77,071.72/115,616.84 = 27,141.50/x
3. Step 3: Cross multiply
   77,071.72x = 115,616.84 × 27,141.50
4. Step 4: Simplify right side
   77,071.72x = 3,138,013,884.78
5. Step 5: Solve for x
   x = 3,138,013,884.78/77,071.72
6. Step 6: Final answer
   x = 40,715.50