Finding the Fourth Proportional to 56,839.32, 85,300.74 and 45,877.32

Step by Step Solution

1. Step 1: Write the proportion equation
   56,839.32 : 85,300.74 = 45,877.32 : x
2. Step 2: Convert to fraction form
   56,839.32/85,300.74 = 45,877.32/x
3. Step 3: Cross multiply
   56,839.32x = 85,300.74 × 45,877.32
4. Step 4: Simplify right side
   56,839.32x = 3,913,369,345.22
5. Step 5: Solve for x
   x = 3,913,369,345.22/56,839.32
6. Step 6: Final answer
   x = 68,849.69