Finding the Fourth Proportional to 67,876.96, 101,830.20 and 21,133.60

Step by Step Solution

1. Step 1: Write the proportion equation
   67,876.96 : 101,830.20 = 21,133.60 : x
2. Step 2: Convert to fraction form
   67,876.96/101,830.20 = 21,133.60/x
3. Step 3: Cross multiply
   67,876.96x = 101,830.20 × 21,133.60
4. Step 4: Simplify right side
   67,876.96x = 2,152,038,714.72
5. Step 5: Solve for x
   x = 2,152,038,714.72/67,876.96
6. Step 6: Final answer
   x = 31,705.00