Finding the Fourth Proportional to 70,554.65, 105,776.48 and 48,300.57

Step by Step Solution

1. Step 1: Write the proportion equation
   70,554.65 : 105,776.48 = 48,300.57 : x
2. Step 2: Convert to fraction form
   70,554.65/105,776.48 = 48,300.57/x
3. Step 3: Cross multiply
   70,554.65x = 105,776.48 × 48,300.57
4. Step 4: Simplify right side
   70,554.65x = 5,109,064,397.35
5. Step 5: Solve for x
   x = 5,109,064,397.35/70,554.65
6. Step 6: Final answer
   x = 72,412.87