Finding the Fourth Proportional to 91,710.70, 137,585.86 and 28,529.62

Step by Step Solution

1. Step 1: Write the proportion equation
   91,710.70 : 137,585.86 = 28,529.62 : x
2. Step 2: Convert to fraction form
   91,710.70/137,585.86 = 28,529.62/x
3. Step 3: Cross multiply
   91,710.70x = 137,585.86 × 28,529.62
4. Step 4: Simplify right side
   91,710.70x = 3,925,272,303.17
5. Step 5: Solve for x
   x = 3,925,272,303.17/91,710.70
6. Step 6: Final answer
   x = 42,800.59