Finding the Fourth Proportional to 218,931.46, 328,526.89 and 92,564.78

Step by Step Solution

1. Step 1: Write the proportion equation
   218,931.46 : 328,526.89 = 92,564.78 : x
2. Step 2: Convert to fraction form
   218,931.46/328,526.89 = 92,564.78/x
3. Step 3: Cross multiply
   218,931.46x = 328,526.89 × 92,564.78
4. Step 4: Simplify right side
   218,931.46x = 30,410,017,422.89
5. Step 5: Solve for x
   x = 30,410,017,422.89/218,931.46
6. Step 6: Final answer
   x = 138,902.00