Finding the Fourth Proportional to 77,361.12, 106,697.52 and 51,858.72

Step by Step Solution

1. Step 1: Write the proportion equation
   77,361.12 : 106,697.52 = 51,858.72 : x
2. Step 2: Convert to fraction form
   77,361.12/106,697.52 = 51,858.72/x
3. Step 3: Cross multiply
   77,361.12x = 106,697.52 × 51,858.72
4. Step 4: Simplify right side
   77,361.12x = 5,533,196,814.37
5. Step 5: Solve for x
   x = 5,533,196,814.37/77,361.12
6. Step 6: Final answer
   x = 71,524.26