Finding the Fourth Proportional to 70,538.59, 105,811.35 and 28,412.99

Step by Step Solution

1. Step 1: Write the proportion equation
   70,538.59 : 105,811.35 = 28,412.99 : x
2. Step 2: Convert to fraction form
   70,538.59/105,811.35 = 28,412.99/x
3. Step 3: Cross multiply
   70,538.59x = 105,811.35 × 28,412.99
4. Step 4: Simplify right side
   70,538.59x = 3,006,416,300.38
5. Step 5: Solve for x
   x = 3,006,416,300.38/70,538.59
6. Step 6: Final answer
   x = 42,620.87