Finding the Fourth Proportional to 76,320.16, 105,322.08 and 42,784

Step by Step Solution

1. Step 1: Write the proportion equation
   76,320.16 : 105,322.08 = 42,784 : x
2. Step 2: Convert to fraction form
   76,320.16/105,322.08 = 42,784/x
3. Step 3: Cross multiply
   76,320.16x = 105,322.08 × 42,784
4. Step 4: Simplify right side
   76,320.16x = 4,506,099,870.72
5. Step 5: Solve for x
   x = 4,506,099,870.72/76,320.16
6. Step 6: Final answer
   x = 59,042.07