Finding the Fourth Proportional to 309,400.56, 464,168.88 and 99,059.76

Step by Step Solution

1. Step 1: Write the proportion equation
   309,400.56 : 464,168.88 = 99,059.76 : x
2. Step 2: Convert to fraction form
   309,400.56/464,168.88 = 99,059.76/x
3. Step 3: Cross multiply
   309,400.56x = 464,168.88 × 99,059.76
4. Step 4: Simplify right side
   309,400.56x = 45,980,457,852.27
5. Step 5: Solve for x
   x = 45,980,457,852.27/309,400.56
6. Step 6: Final answer
   x = 148,611.42