Finding the Fourth Proportional to 99,608.69, 149,457.05 and 52,212.45

Step by Step Solution

1. Step 1: Write the proportion equation
   99,608.69 : 149,457.05 = 52,212.45 : x
2. Step 2: Convert to fraction form
   99,608.69/149,457.05 = 52,212.45/x
3. Step 3: Cross multiply
   99,608.69x = 149,457.05 × 52,212.45
4. Step 4: Simplify right side
   99,608.69x = 7,803,518,880.80
5. Step 5: Solve for x
   x = 7,803,518,880.80/99,608.69
6. Step 6: Final answer
   x = 78,341.75