Finding the Fourth Proportional to 90,870.33, 136,259.72 and 52,931.82

Step by Step Solution

1. Step 1: Write the proportion equation
   90,870.33 : 136,259.72 = 52,931.82 : x
2. Step 2: Convert to fraction form
   90,870.33/136,259.72 = 52,931.82/x
3. Step 3: Cross multiply
   90,870.33x = 136,259.72 × 52,931.82
4. Step 4: Simplify right side
   90,870.33x = 7,212,474,972.29
5. Step 5: Solve for x
   x = 7,212,474,972.29/90,870.33
6. Step 6: Final answer
   x = 79,371.07