Finding the Fourth Proportional to 101,216,899.20, 139,679,510.91 and 56,562,871.59

Step by Step Solution

1. Step 1: Write the proportion equation
   101,216,899.20 : 139,679,510.91 = 56,562,871.59 : x
2. Step 2: Convert to fraction form
   101,216,899.20/139,679,510.91 = 56,562,871.59/x
3. Step 3: Cross multiply
   101,216,899.20x = 139,679,510.91 × 56,562,871.59
4. Step 4: Simplify right side
   101,216,899.20x = 7,900,674,239,356,334
5. Step 5: Solve for x
   x = 7,900,674,239,356,334/101,216,899.20
6. Step 6: Final answer
   x = 78,056,868.98