Finding the Fourth Proportional to 102,066.42, 140,854.71 and 56,123.68

Step by Step Solution

1. Step 1: Write the proportion equation
   102,066.42 : 140,854.71 = 56,123.68 : x
2. Step 2: Convert to fraction form
   102,066.42/140,854.71 = 56,123.68/x
3. Step 3: Cross multiply
   102,066.42x = 140,854.71 × 56,123.68
4. Step 4: Simplify right side
   102,066.42x = 7,905,284,670.53
5. Step 5: Solve for x
   x = 7,905,284,670.53/102,066.42
6. Step 6: Final answer
   x = 77,452.36