Finding the Fourth Proportional to 42,100.60, 63,151.21 and 28,912.99

Step by Step Solution

1. Step 1: Write the proportion equation
   42,100.60 : 63,151.21 = 28,912.99 : x
2. Step 2: Convert to fraction form
   42,100.60/63,151.21 = 28,912.99/x
3. Step 3: Cross multiply
   42,100.60x = 63,151.21 × 28,912.99
4. Step 4: Simplify right side
   42,100.60x = 1,825,890,303.22
5. Step 5: Solve for x
   x = 1,825,890,303.22/42,100.60
6. Step 6: Final answer
   x = 43,369.70