Finding the Fourth Proportional to 52,070.76, 78,106.12 and 20,906

Step by Step Solution

1. Step 1: Write the proportion equation
   52,070.76 : 78,106.12 = 20,906 : x
2. Step 2: Convert to fraction form
   52,070.76/78,106.12 = 20,906/x
3. Step 3: Cross multiply
   52,070.76x = 78,106.12 × 20,906
4. Step 4: Simplify right side
   52,070.76x = 1,632,886,544.72
5. Step 5: Solve for x
   x = 1,632,886,544.72/52,070.76
6. Step 6: Final answer
   x = 31,358.99