Finding the Fourth Proportional to 98,574.78, 147,756.59 and 70,409.42

Step by Step Solution

1. Step 1: Write the proportion equation
   98,574.78 : 147,756.59 = 70,409.42 : x
2. Step 2: Convert to fraction form
   98,574.78/147,756.59 = 70,409.42/x
3. Step 3: Cross multiply
   98,574.78x = 147,756.59 × 70,409.42
4. Step 4: Simplify right side
   98,574.78x = 10,403,455,081.64
5. Step 5: Solve for x
   x = 10,403,455,081.64/98,574.78
6. Step 6: Final answer
   x = 105,538.71