Finding the Fourth Proportional to 76,499.32, 105,566.34 and 42,507.40

Step by Step Solution

1. Step 1: Write the proportion equation
   76,499.32 : 105,566.34 = 42,507.40 : x
2. Step 2: Convert to fraction form
   76,499.32/105,566.34 = 42,507.40/x
3. Step 3: Cross multiply
   76,499.32x = 105,566.34 × 42,507.40
4. Step 4: Simplify right side
   76,499.32x = 4,487,350,640.92
5. Step 5: Solve for x
   x = 4,487,350,640.92/76,499.32
6. Step 6: Final answer
   x = 58,658.70