Finding the Fourth Proportional to 93,312, 140,667.84 and 91,912.32

Step by Step Solution

1. Step 1: Write the proportion equation
   93,312 : 140,667.84 = 91,912.32 : x
2. Step 2: Convert to fraction form
   93,312/140,667.84 = 91,912.32/x
3. Step 3: Cross multiply
   93,312x = 140,667.84 × 91,912.32
4. Step 4: Simplify right side
   93,312x = 12,929,107,523.79
5. Step 5: Solve for x
   x = 12,929,107,523.79/93,312
6. Step 6: Final answer
   x = 138,557.82