Finding the Fourth Proportional to 38,429.69, 53,032.05 and 21,435.57

Step by Step Solution

1. Step 1: Write the proportion equation
   38,429.69 : 53,032.05 = 21,435.57 : x
2. Step 2: Convert to fraction form
   38,429.69/53,032.05 = 21,435.57/x
3. Step 3: Cross multiply
   38,429.69x = 53,032.05 × 21,435.57
4. Step 4: Simplify right side
   38,429.69x = 1,136,772,220.02
5. Step 5: Solve for x
   x = 1,136,772,220.02/38,429.69
6. Step 6: Final answer
   x = 29,580.58