Finding the Fourth Proportional to 70,595.90, 105,870.35 and 28,465.10

Step by Step Solution

1. Step 1: Write the proportion equation
   70,595.90 : 105,870.35 = 28,465.10 : x
2. Step 2: Convert to fraction form
   70,595.90/105,870.35 = 28,465.10/x
3. Step 3: Cross multiply
   70,595.90x = 105,870.35 × 28,465.10
4. Step 4: Simplify right side
   70,595.90x = 3,013,609,641.60
5. Step 5: Solve for x
   x = 3,013,609,641.60/70,595.90
6. Step 6: Final answer
   x = 42,688.17