Finding the Fourth Proportional to 101,384.89, 139,909.68 and 56,061.88

Step by Step Solution

1. Step 1: Write the proportion equation
   101,384.89 : 139,909.68 = 56,061.88 : x
2. Step 2: Convert to fraction form
   101,384.89/139,909.68 = 56,061.88/x
3. Step 3: Cross multiply
   101,384.89x = 139,909.68 × 56,061.88
4. Step 4: Simplify right side
   101,384.89x = 7,843,599,341.22
5. Step 5: Solve for x
   x = 7,843,599,341.22/101,384.89
6. Step 6: Final answer
   x = 77,364.58