Finding the Fourth Proportional to 58,939,856.67, 80,747,891.76 and 56,730,804.63

Step by Step Solution

1. Step 1: Write the proportion equation
   58,939,856.67 : 80,747,891.76 = 56,730,804.63 : x
2. Step 2: Convert to fraction form
   58,939,856.67/80,747,891.76 = 56,730,804.63/x
3. Step 3: Cross multiply
   58,939,856.67x = 80,747,891.76 × 56,730,804.63
4. Step 4: Simplify right side
   58,939,856.67x = 4,580,892,871,933,688
5. Step 5: Solve for x
   x = 4,580,892,871,933,688/58,939,856.67
6. Step 6: Final answer
   x = 77,721,479.67