Finding the Fourth Proportional to 312,984, 469,566.72 and 91,368

Step by Step Solution

1. Step 1: Write the proportion equation
   312,984 : 469,566.72 = 91,368 : x
2. Step 2: Convert to fraction form
   312,984/469,566.72 = 91,368/x
3. Step 3: Cross multiply
   312,984x = 469,566.72 × 91,368
4. Step 4: Simplify right side
   312,984x = 42,903,372,072.96
5. Step 5: Solve for x
   x = 42,903,372,072.96/312,984
6. Step 6: Final answer
   x = 137,078.48