Finding the Fourth Proportional to 152,276.72, 210,142.36 and 85,208.56

Step by Step Solution

1. Step 1: Write the proportion equation
   152,276.72 : 210,142.36 = 85,208.56 : x
2. Step 2: Convert to fraction form
   152,276.72/210,142.36 = 85,208.56/x
3. Step 3: Cross multiply
   152,276.72x = 210,142.36 × 85,208.56
4. Step 4: Simplify right side
   152,276.72x = 17,905,927,890.60
5. Step 5: Solve for x
   x = 17,905,927,890.60/152,276.72
6. Step 6: Final answer
   x = 117,588.08