Finding the Fourth Proportional to 52,432.28, 78,647.94 and 21,260.12

Step by Step Solution

1. Step 1: Write the proportion equation
   52,432.28 : 78,647.94 = 21,260.12 : x
2. Step 2: Convert to fraction form
   52,432.28/78,647.94 = 21,260.12/x
3. Step 3: Cross multiply
   52,432.28x = 78,647.94 × 21,260.12
4. Step 4: Simplify right side
   52,432.28x = 1,672,064,642.15
5. Step 5: Solve for x
   x = 1,672,064,642.15/52,432.28
6. Step 6: Final answer
   x = 31,889.99