Finding the Fourth Proportional to 162,151.05, 243,271.17 and 77,981.63

Step by Step Solution

1. Step 1: Write the proportion equation
   162,151.05 : 243,271.17 = 77,981.63 : x
2. Step 2: Convert to fraction form
   162,151.05/243,271.17 = 77,981.63/x
3. Step 3: Cross multiply
   162,151.05x = 243,271.17 × 77,981.63
4. Step 4: Simplify right side
   162,151.05x = 18,970,681,152.25
5. Step 5: Solve for x
   x = 18,970,681,152.25/162,151.05
6. Step 6: Final answer
   x = 116,993.88