Finding the Fourth Proportional to 101,373.31, 139,905.12 and 56,061.91

Step by Step Solution

1. Step 1: Write the proportion equation
   101,373.31 : 139,905.12 = 56,061.91 : x
2. Step 2: Convert to fraction form
   101,373.31/139,905.12 = 56,061.91/x
3. Step 3: Cross multiply
   101,373.31x = 139,905.12 × 56,061.91
4. Step 4: Simplify right side
   101,373.31x = 7,843,348,245.98
5. Step 5: Solve for x
   x = 7,843,348,245.98/101,373.31
6. Step 6: Final answer
   x = 77,370.94