Finding the Fourth Proportional to 69,645, 96,109.86 and 39,429.72

Step by Step Solution

1. Step 1: Write the proportion equation
   69,645 : 96,109.86 = 39,429.72 : x
2. Step 2: Convert to fraction form
   69,645/96,109.86 = 39,429.72/x
3. Step 3: Cross multiply
   69,645x = 96,109.86 × 39,429.72
4. Step 4: Simplify right side
   69,645x = 3,789,584,869.04
5. Step 5: Solve for x
   x = 3,789,584,869.04/69,645
6. Step 6: Final answer
   x = 54,412.88