Finding the Fourth Proportional to 52,435.62, 78,655.86 and 20,852.10

Step by Step Solution

1. Step 1: Write the proportion equation
   52,435.62 : 78,655.86 = 20,852.10 : x
2. Step 2: Convert to fraction form
   52,435.62/78,655.86 = 20,852.10/x
3. Step 3: Cross multiply
   52,435.62x = 78,655.86 × 20,852.10
4. Step 4: Simplify right side
   52,435.62x = 1,640,139,858.31
5. Step 5: Solve for x
   x = 1,640,139,858.31/52,435.62
6. Step 6: Final answer
   x = 31,279.12