Finding the Fourth Proportional to 101,384.28, 139,904.58 and 56,059.50

Step by Step Solution

1. Step 1: Write the proportion equation
   101,384.28 : 139,904.58 = 56,059.50 : x
2. Step 2: Convert to fraction form
   101,384.28/139,904.58 = 56,059.50/x
3. Step 3: Cross multiply
   101,384.28x = 139,904.58 × 56,059.50
4. Step 4: Simplify right side
   101,384.28x = 7,842,980,802.51
5. Step 5: Solve for x
   x = 7,842,980,802.51/101,384.28
6. Step 6: Final answer
   x = 77,358.94