Finding the Fourth Proportional to 152,670.53, 210,688.72 and 84,685.30

Step by Step Solution

1. Step 1: Write the proportion equation
   152,670.53 : 210,688.72 = 84,685.30 : x
2. Step 2: Convert to fraction form
   152,670.53/210,688.72 = 84,685.30/x
3. Step 3: Cross multiply
   152,670.53x = 210,688.72 × 84,685.30
4. Step 4: Simplify right side
   152,670.53x = 17,842,236,721.38
5. Step 5: Solve for x
   x = 17,842,236,721.38/152,670.53
6. Step 6: Final answer
   x = 116,867.59