Finding the Fourth Proportional to 243,066.15, 364,635.69 and 85,266.81

Step by Step Solution

1. Step 1: Write the proportion equation
   243,066.15 : 364,635.69 = 85,266.81 : x
2. Step 2: Convert to fraction form
   243,066.15/364,635.69 = 85,266.81/x
3. Step 3: Cross multiply
   243,066.15x = 364,635.69 × 85,266.81
4. Step 4: Simplify right side
   243,066.15x = 31,091,322,098.45
5. Step 5: Solve for x
   x = 31,091,322,098.45/243,066.15
6. Step 6: Final answer
   x = 127,913.01