Finding the Fourth Proportional to 105,030.69, 157,485.55 and 45,838.05

Step by Step Solution

1. Step 1: Write the proportion equation
   105,030.69 : 157,485.55 = 45,838.05 : x
2. Step 2: Convert to fraction form
   105,030.69/157,485.55 = 45,838.05/x
3. Step 3: Cross multiply
   105,030.69x = 157,485.55 × 45,838.05
4. Step 4: Simplify right side
   105,030.69x = 7,218,830,515.18
5. Step 5: Solve for x
   x = 7,218,830,515.18/105,030.69
6. Step 6: Final answer
   x = 68,730.68