Finding the Fourth Proportional to 77,066.42, 115,599.71 and 50,434.90

Step by Step Solution

1. Step 1: Write the proportion equation
   77,066.42 : 115,599.71 = 50,434.90 : x
2. Step 2: Convert to fraction form
   77,066.42/115,599.71 = 50,434.90/x
3. Step 3: Cross multiply
   77,066.42x = 115,599.71 × 50,434.90
4. Step 4: Simplify right side
   77,066.42x = 5,830,259,813.88
5. Step 5: Solve for x
   x = 5,830,259,813.88/77,066.42
6. Step 6: Final answer
   x = 75,652.40