Finding the Fourth Proportional to 60,814, 91,146.12 and 43,188.40

Step by Step Solution

1. Step 1: Write the proportion equation
   60,814 : 91,146.12 = 43,188.40 : x
2. Step 2: Convert to fraction form
   60,814/91,146.12 = 43,188.40/x
3. Step 3: Cross multiply
   60,814x = 91,146.12 × 43,188.40
4. Step 4: Simplify right side
   60,814x = 3,936,455,089.01
5. Step 5: Solve for x
   x = 3,936,455,089.01/60,814
6. Step 6: Final answer
   x = 64,729.42