Finding the Fourth Proportional to 103,429.31, 155,140.88 and 28,554.02

Step by Step Solution

1. Step 1: Write the proportion equation
   103,429.31 : 155,140.88 = 28,554.02 : x
2. Step 2: Convert to fraction form
   103,429.31/155,140.88 = 28,554.02/x
3. Step 3: Cross multiply
   103,429.31x = 155,140.88 × 28,554.02
4. Step 4: Simplify right side
   103,429.31x = 4,429,896,150.23
5. Step 5: Solve for x
   x = 4,429,896,150.23/103,429.31
6. Step 6: Final answer
   x = 42,830.18